818497 has 4 divisors (see below), whose sum is σ = 820656. Its totient is φ = 816340.

The previous prime is 818473. The next prime is 818509. The reversal of 818497 is 794818.

818497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-818497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818897) 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, 343 + ... + 1324.

It is an arithmetic number, because the mean of its divisors is an integer number (205164).

2⁸¹⁸⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

818497 is a deficient number, since it is larger than the sum of its proper divisors (2159).

818497 is a wasteful number, since it uses less digits than its factorization.

818497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158.

The product of its digits is 16128, while the sum is 37.

The square root of 818497 is about 904.7082402631. The cubic root of 818497 is about 93.5417945401.

It can be divided in two parts, 8184 and 97, that added together give a square (8281 = 91²).

The spelling of 818497 in words is "eight hundred eighteen thousand, four hundred ninety-seven".