900979813 has 2 divisors, whose sum is σ = 900979814. Its totient is φ = 900979812.

The previous prime is 900979799. The next prime is 900979819. The reversal of 900979813 is 318979009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 454840929 + 446138884 = 21327^2 + 21122^2 .

It is an emirp because it is prime and its reverse (318979009) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900979813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900979819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450489906 + 450489907.

It is an arithmetic number, because the mean of its divisors is an integer number (450489907).

Almost surely, 2^900979813 is an apocalyptic number.

It is an amenable number.

900979813 is a deficient number, since it is larger than the sum of its proper divisors (1).

900979813 is an equidigital number, since it uses as much as digits as its factorization.

900979813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 900979813 is about 30016.3257744848. The cubic root of 900979813 is about 965.8396275541.

The spelling of 900979813 in words is "nine hundred million, nine hundred seventy-nine thousand, eight hundred thirteen".