402639113 has 4 divisors (see below), whose sum is σ = 408648720. Its totient is φ = 396629508.

The previous prime is 402639079. The next prime is 402639121. The reversal of 402639113 is 311936204.

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 402639113 - 2⁶ = 402639049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402639163) 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, 3004703 + ... + 3004836.

It is an arithmetic number, because the mean of its divisors is an integer number (102162180).

Almost surely, 2^402639113 is an apocalyptic number.

It is an amenable number.

402639113 is a deficient number, since it is larger than the sum of its proper divisors (6009607).

402639113 is an equidigital number, since it uses as much as digits as its factorization.

402639113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009606.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 402639113 is about 20065.8693556995. The cubic root of 402639113 is about 738.4231782238.

The spelling of 402639113 in words is "four hundred two million, six hundred thirty-nine thousand, one hundred thirteen".