902012813 has 4 divisors (see below), whose sum is σ = 971398428. Its totient is φ = 832627200.

The previous prime is 902012807. The next prime is 902012887. The reversal of 902012813 is 318210209.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 258984649 + 643028164 = 16093^2 + 25358^2 .

It is a cyclic number.

It is not a de Polignac number, because 902012813 - 2⁸ = 902012557 is a prime.

It is a super-2 number, since 2×902012813² = 1627254229632345938, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902011813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34692788 + ... + 34692813.

It is an arithmetic number, because the mean of its divisors is an integer number (242849607).

Almost surely, 2^902012813 is an apocalyptic number.

It is an amenable number.

902012813 is a deficient number, since it is larger than the sum of its proper divisors (69385615).

902012813 is a wasteful number, since it uses less digits than its factorization.

902012813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69385614.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 902012813 is about 30033.5281477218. The cubic root of 902012813 is about 966.2086078062.

The spelling of 902012813 in words is "nine hundred two million, twelve thousand, eight hundred thirteen".