400903139 has 16 divisors (see below), whose sum is σ = 493984512. Its totient is φ = 316834848.

The previous prime is 400903121. The next prime is 400903169. The reversal of 400903139 is 931309004.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400903139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400903109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100232 + ... + 104154.

It is an arithmetic number, because the mean of its divisors is an integer number (30874032).

Almost surely, 2^400903139 is an apocalyptic number.

400903139 is a deficient number, since it is larger than the sum of its proper divisors (93081373).

400903139 is a wasteful number, since it uses less digits than its factorization.

400903139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 400903139 is about 20022.5657446792. The cubic root of 400903139 is about 737.3604149884.

The spelling of 400903139 in words is "four hundred million, nine hundred three thousand, one hundred thirty-nine".