402355139 has 4 divisors (see below), whose sum is σ = 403236024. Its totient is φ = 401474256.

The previous prime is 402355097. The next prime is 402355223. The reversal of 402355139 is 931553204.

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-402355139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402355339) 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, 439757 + ... + 440670.

It is an arithmetic number, because the mean of its divisors is an integer number (100809006).

Almost surely, 2^402355139 is an apocalyptic number.

402355139 is a deficient number, since it is larger than the sum of its proper divisors (880885).

402355139 is an equidigital number, since it uses as much as digits as its factorization.

402355139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880884.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 402355139 is about 20058.7920623352. The cubic root of 402355139 is about 738.2495386098.

The spelling of 402355139 in words is "four hundred two million, three hundred fifty-five thousand, one hundred thirty-nine".