400902179 has 2 divisors, whose sum is σ = 400902180. Its totient is φ = 400902178.

The previous prime is 400902127. The next prime is 400902181. The reversal of 400902179 is 971209004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400902179 - 2²⁴ = 384124963 is a prime.

Together with 400902181, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400902479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200451089 + 200451090.

It is an arithmetic number, because the mean of its divisors is an integer number (200451090).

Almost surely, 2^400902179 is an apocalyptic number.

400902179 is a deficient number, since it is larger than the sum of its proper divisors (1).

400902179 is an equidigital number, since it uses as much as digits as its factorization.

400902179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 400902179 is about 20022.5417717132. The cubic root of 400902179 is about 737.3598264285.

The spelling of 400902179 in words is "four hundred million, nine hundred two thousand, one hundred seventy-nine".