900999013 has 2 divisors, whose sum is σ = 900999014. Its totient is φ = 900999012.

The previous prime is 900999007. The next prime is 900999037. The reversal of 900999013 is 310999009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 537219684 + 363779329 = 23178^2 + 19073^2 .

It is a cyclic number.

It is not a de Polignac number, because 900999013 - 2²⁵ = 867444581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900999053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450499506 + 450499507.

It is an arithmetic number, because the mean of its divisors is an integer number (450499507).

Almost surely, 2^900999013 is an apocalyptic number.

It is an amenable number.

900999013 is a deficient number, since it is larger than the sum of its proper divisors (1).

900999013 is an equidigital number, since it uses as much as digits as its factorization.

900999013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 900999013 is about 30016.6455987340. The cubic root of 900999013 is about 965.8464882291.

The spelling of 900999013 in words is "nine hundred million, nine hundred ninety-nine thousand, thirteen".