802990813 has 2 divisors, whose sum is σ = 802990814. Its totient is φ = 802990812.

The previous prime is 802990807. The next prime is 802990823. The reversal of 802990813 is 318099208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430230564 + 372760249 = 20742^2 + 19307^2 .

It is a cyclic number.

It is not a de Polignac number, because 802990813 - 2²¹ = 800893661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (802990823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401495406 + 401495407.

It is an arithmetic number, because the mean of its divisors is an integer number (401495407).

Almost surely, 2^802990813 is an apocalyptic number.

It is an amenable number.

802990813 is a deficient number, since it is larger than the sum of its proper divisors (1).

802990813 is an equidigital number, since it uses as much as digits as its factorization.

802990813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 802990813 is about 28337.0925290510. The cubic root of 802990813 is about 929.4731717684.

The spelling of 802990813 in words is "eight hundred two million, nine hundred ninety thousand, eight hundred thirteen".