400912137 has 12 divisors (see below), whose sum is σ = 584409540. Its totient is φ = 264822048.

The previous prime is 400912129. The next prime is 400912219. The reversal of 400912137 is 731219004.

It can be written as a sum of positive squares in 2 ways, for example, as 189035001 + 211877136 = 13749^2 + 14556^2 .

It is not a de Polignac number, because 400912137 - 2³ = 400912129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400912137.

It is not an unprimeable number, because it can be changed into a prime (400912117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203358 + ... + 205319.

It is an arithmetic number, because the mean of its divisors is an integer number (48700795).

Almost surely, 2^400912137 is an apocalyptic number.

It is an amenable number.

400912137 is a deficient number, since it is larger than the sum of its proper divisors (183497403).

400912137 is a wasteful number, since it uses less digits than its factorization.

400912137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408792 (or 408789 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 400912137 is about 20022.7904398962. The cubic root of 400912137 is about 737.3659314659.

The spelling of 400912137 in words is "four hundred million, nine hundred twelve thousand, one hundred thirty-seven".