813433813 has 2 divisors, whose sum is σ = 813433814. Its totient is φ = 813433812.

The previous prime is 813433739. The next prime is 813433853. The reversal of 813433813 is 318334318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572501329 + 240932484 = 23927^2 + 15522^2 .

It is a cyclic number.

It is not a de Polignac number, because 813433813 - 2²⁵ = 779879381 is a prime.

It is equal to p_41801398 and since 813433813 and 41801398 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813433853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406716906 + 406716907.

It is an arithmetic number, because the mean of its divisors is an integer number (406716907).

Almost surely, 2^813433813 is an apocalyptic number.

It is an amenable number.

813433813 is a deficient number, since it is larger than the sum of its proper divisors (1).

813433813 is an equidigital number, since it uses as much as digits as its factorization.

813433813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 813433813 is about 28520.7610873202. The cubic root of 813433813 is about 933.4851361787.

The spelling of 813433813 in words is "eight hundred thirteen million, four hundred thirty-three thousand, eight hundred thirteen".