813700825 has 48 divisors (see below), whose sum is σ = 1197351936. Its totient is φ = 536961600.

The previous prime is 813700819. The next prime is 813700841. The reversal of 813700825 is 528007318.

It is not a de Polignac number, because 813700825 - 2⁵ = 813700793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 533514 + ... + 535036.

It is an arithmetic number, because the mean of its divisors is an integer number (24944832).

Almost surely, 2^813700825 is an apocalyptic number.

It is an amenable number.

813700825 is a deficient number, since it is larger than the sum of its proper divisors (383651111).

813700825 is a wasteful number, since it uses less digits than its factorization.

813700825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 813700825 is about 28525.4417143714. The cubic root of 813700825 is about 933.5872647361.

The spelling of 813700825 in words is "eight hundred thirteen million, seven hundred thousand, eight hundred twenty-five".