497721481 has 4 divisors (see below), whose sum is σ = 497790592. Its totient is φ = 497652372.

The previous prime is 497721457. The next prime is 497721533. The reversal of 497721481 is 184127794.

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: 184127794 = 2 ⋅92063897.

It is a cyclic number.

It is not a de Polignac number, because 497721481 - 2⁷ = 497721353 is a prime.

It is a super-2 number, since 2×497721481² = 495453345297666722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (497721401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22305 + ... + 38638.

It is an arithmetic number, because the mean of its divisors is an integer number (124447648).

Almost surely, 2^497721481 is an apocalyptic number.

It is an amenable number.

497721481 is a deficient number, since it is larger than the sum of its proper divisors (69111).

497721481 is an equidigital number, since it uses as much as digits as its factorization.

497721481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69110.

The product of its digits is 112896, while the sum is 43.

The square root of 497721481 is about 22309.6723642460. The cubic root of 497721481 is about 792.4930487968.

The spelling of 497721481 in words is "four hundred ninety-seven million, seven hundred twenty-one thousand, four hundred eighty-one".