400401137 has 2 divisors, whose sum is σ = 400401138. Its totient is φ = 400401136.

The previous prime is 400401109. The next prime is 400401191. The reversal of 400401137 is 731104004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241615936 + 158785201 = 15544^2 + 12601^2 .

It is a cyclic number.

It is not a de Polignac number, because 400401137 - 2⁶ = 400401073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400401737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200200568 + 200200569.

It is an arithmetic number, because the mean of its divisors is an integer number (200200569).

Almost surely, 2^400401137 is an apocalyptic number.

It is an amenable number.

400401137 is a deficient number, since it is larger than the sum of its proper divisors (1).

400401137 is an equidigital number, since it uses as much as digits as its factorization.

400401137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 400401137 is about 20010.0259120272. The cubic root of 400401137 is about 737.0525176644.

The spelling of 400401137 in words is "four hundred million, four hundred one thousand, one hundred thirty-seven".