497978623 has 4 divisors (see below), whose sum is σ = 498957480. Its totient is φ = 496999768.

The previous prime is 497978539. The next prime is 497978627. The reversal of 497978623 is 326879794.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 497978623 - 2²¹ = 495881471 is a prime.

It is a super-2 number, since 2×497978623² = 495965417929952258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497978627) 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, 488665 + ... + 489682.

It is an arithmetic number, because the mean of its divisors is an integer number (124739370).

Almost surely, 2^497978623 is an apocalyptic number.

497978623 is a deficient number, since it is larger than the sum of its proper divisors (978857).

497978623 is an equidigital number, since it uses as much as digits as its factorization.

497978623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978856.

The product of its digits is 4572288, while the sum is 55.

The square root of 497978623 is about 22315.4346361437. The cubic root of 497978623 is about 792.6295027316.

The spelling of 497978623 in words is "four hundred ninety-seven million, nine hundred seventy-eight thousand, six hundred twenty-three".