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497 = 771

497 has 4 divisors (see below), whose sum is σ = 576. Its totient is φ = 420.

The previous prime is 491. The next prime is 499. The reversal of 497 is 794.

497 is nontrivially palindromic in base 15 and base 16.

497 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 794 = 2397.

It is not a de Polignac number, because 497 - 26 = 433 is a prime.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 4 and 97 contains 497 itself.

It is an Ulam number.

It is a pancake number, because a pancake can be divided into 497 parts by 31 straight cuts.

It is a Duffinian number.

497 is an undulating number in base 15 and base 16.

It is a plaindrome in base 12 and base 14.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 497.

It is not an unprimeable number, because it can be changed into a prime (491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29 + ... + 42.

It is an arithmetic number, because the mean of its divisors is an integer number (144).

2497 is an apocalyptic number.

It is an amenable number.

497 is a deficient number, since it is larger than the sum of its proper divisors (79).

497 is an equidigital number, since it uses as much as digits as its factorization.

497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78.

The product of its digits is 252, while the sum is 20.

The square root of 497 is about 22.2934968096. The cubic root of 497 is about 7.9210993950.

It can be divided in two parts, 49 and 7, that multiplied together give a palindrome (343).

The spelling of 497 in words is "four hundred ninety-seven", and thus it is an aban number.

Divisors: 1 7 71 497