900909013 has 2 divisors, whose sum is σ = 900909014. Its totient is φ = 900909012.

The previous prime is 900909007. The next prime is 900909017. The reversal of 900909013 is 310909009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 757460484 + 143448529 = 27522^2 + 11977^2 .

It is a cyclic number.

It is not a de Polignac number, because 900909013 - 2⁹ = 900908501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900909017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450454506 + 450454507.

It is an arithmetic number, because the mean of its divisors is an integer number (450454507).

Almost surely, 2^900909013 is an apocalyptic number.

It is an amenable number.

900909013 is a deficient number, since it is larger than the sum of its proper divisors (1).

900909013 is an equidigital number, since it uses as much as digits as its factorization.

900909013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 900909013 is about 30015.1463931129. The cubic root of 900909013 is about 965.8143279725.

The spelling of 900909013 in words is "nine hundred million, nine hundred nine thousand, thirteen".