400387915013 has 2 divisors, whose sum is σ = 400387915014. Its totient is φ = 400387915012.

The previous prime is 400387915009. The next prime is 400387915127. The reversal of 400387915013 is 310519783004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360170420164 + 40217494849 = 600142^2 + 200543^2 .

It is a cyclic number.

It is not a de Polignac number, because 400387915013 - 2² = 400387915009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400387915513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200193957506 + 200193957507.

It is an arithmetic number, because the mean of its divisors is an integer number (200193957507).

Almost surely, 2^400387915013 is an apocalyptic number.

It is an amenable number.

400387915013 is a deficient number, since it is larger than the sum of its proper divisors (1).

400387915013 is an equidigital number, since it uses as much as digits as its factorization.

400387915013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 400387915013 in words is "four hundred billion, three hundred eighty-seven million, nine hundred fifteen thousand, thirteen".