400037129 has 2 divisors, whose sum is σ = 400037130. Its totient is φ = 400037128.

The previous prime is 400037117. The next prime is 400037179. The reversal of 400037129 is 921730004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396607225 + 3429904 = 19915^2 + 1852^2 .

It is a cyclic number.

It is not a de Polignac number, because 400037129 - 2¹² = 400033033 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 400037098 and 400037107.

It is not a weakly prime, because it can be changed into another prime (400037179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200018564 + 200018565.

It is an arithmetic number, because the mean of its divisors is an integer number (200018565).

Almost surely, 2^400037129 is an apocalyptic number.

It is an amenable number.

400037129 is a deficient number, since it is larger than the sum of its proper divisors (1).

400037129 is an equidigital number, since it uses as much as digits as its factorization.

400037129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 400037129 is about 20000.9282034610. The cubic root of 400037129 is about 736.8290964237.

The spelling of 400037129 in words is "four hundred million, thirty-seven thousand, one hundred twenty-nine".