497816681 has 4 divisors (see below), whose sum is σ = 498586752. Its totient is φ = 497046612.

The previous prime is 497816677. The next prime is 497816747. The reversal of 497816681 is 186618794.

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 not a de Polignac number, because 497816681 - 2² = 497816677 is a prime.

It is a super-2 number, since 2×497816681² = 495642895763711522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (497816881) 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, 384065 + ... + 385358.

It is an arithmetic number, because the mean of its divisors is an integer number (124646688).

Almost surely, 2^497816681 is an apocalyptic number.

It is an amenable number.

497816681 is a deficient number, since it is larger than the sum of its proper divisors (770071).

497816681 is an equidigital number, since it uses as much as digits as its factorization.

497816681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770070.

The product of its digits is 580608, while the sum is 50.

The square root of 497816681 is about 22311.8058659536. The cubic root of 497816681 is about 792.5435727219.

The spelling of 497816681 in words is "four hundred ninety-seven million, eight hundred sixteen thousand, six hundred eighty-one".