862400813 has 2 divisors, whose sum is σ = 862400814. Its totient is φ = 862400812.

The previous prime is 862400809. The next prime is 862400821. The reversal of 862400813 is 318004268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 572788489 + 289612324 = 23933^2 + 17018^2 .

It is a cyclic number.

It is not a de Polignac number, because 862400813 - 2² = 862400809 is a prime.

It is a Chen prime.

It is equal to p_44184470 and since 862400813 and 44184470 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 862400813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (862400113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431200406 + 431200407.

It is an arithmetic number, because the mean of its divisors is an integer number (431200407).

Almost surely, 2^862400813 is an apocalyptic number.

It is an amenable number.

862400813 is a deficient number, since it is larger than the sum of its proper divisors (1).

862400813 is an equidigital number, since it uses as much as digits as its factorization.

862400813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 862400813 is about 29366.6615909946. The cubic root of 862400813 is about 951.8526406834.

The spelling of 862400813 in words is "eight hundred sixty-two million, four hundred thousand, eight hundred thirteen".