402974999 has 4 divisors (see below), whose sum is σ = 460542864. Its totient is φ = 345407136.

The previous prime is 402974989. The next prime is 402975017. The reversal of 402974999 is 999479204.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402974999 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 402974999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402974909) 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, 28783922 + ... + 28783935.

It is an arithmetic number, because the mean of its divisors is an integer number (115135716).

Almost surely, 2^402974999 is an apocalyptic number.

402974999 is a deficient number, since it is larger than the sum of its proper divisors (57567865).

402974999 is an equidigital number, since it uses as much as digits as its factorization.

402974999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57567864.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 402974999 is about 20074.2371959684. The cubic root of 402974999 is about 738.6284547463.

The spelling of 402974999 in words is "four hundred two million, nine hundred seventy-four thousand, nine hundred ninety-nine".