99902813 has 2 divisors, whose sum is σ = 99902814. Its totient is φ = 99902812.

The previous prime is 99902809. The next prime is 99902821. The reversal of 99902813 is 31820999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88322404 + 11580409 = 9398^2 + 3403^2 .

It is a cyclic number.

It is not a de Polignac number, because 99902813 - 2² = 99902809 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99902833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49951406 + 49951407.

It is an arithmetic number, because the mean of its divisors is an integer number (49951407).

Almost surely, 2^99902813 is an apocalyptic number.

It is an amenable number.

99902813 is a deficient number, since it is larger than the sum of its proper divisors (1).

99902813 is an equidigital number, since it uses as much as digits as its factorization.

99902813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 99902813 is about 9995.1394687618. The cubic root of 99902813 is about 464.0084672578.

The spelling of 99902813 in words is "ninety-nine million, nine hundred two thousand, eight hundred thirteen".