400707913 has 2 divisors, whose sum is σ = 400707914. Its totient is φ = 400707912.

The previous prime is 400707911. The next prime is 400707961. The reversal of 400707913 is 319707004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210047049 + 190660864 = 14493^2 + 13808^2 .

It is a cyclic number.

It is not a de Polignac number, because 400707913 - 2¹ = 400707911 is a prime.

Together with 400707911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (400707911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200353956 + 200353957.

It is an arithmetic number, because the mean of its divisors is an integer number (200353957).

Almost surely, 2^400707913 is an apocalyptic number.

It is an amenable number.

400707913 is a deficient number, since it is larger than the sum of its proper divisors (1).

400707913 is an equidigital number, since it uses as much as digits as its factorization.

400707913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 400707913 is about 20017.6900015961. The cubic root of 400707913 is about 737.2407058590.

The spelling of 400707913 in words is "four hundred million, seven hundred seven thousand, nine hundred thirteen".