813625867 has 2 divisors, whose sum is σ = 813625868. Its totient is φ = 813625866.

The previous prime is 813625861. The next prime is 813625889. The reversal of 813625867 is 768526318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 813625867 - 2¹¹ = 813623819 is a prime.

It is not a weakly prime, because it can be changed into another prime (813625861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406812933 + 406812934.

It is an arithmetic number, because the mean of its divisors is an integer number (406812934).

Almost surely, 2^813625867 is an apocalyptic number.

813625867 is a deficient number, since it is larger than the sum of its proper divisors (1).

813625867 is an equidigital number, since it uses as much as digits as its factorization.

813625867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 813625867 is about 28524.1278043694. The cubic root of 813625867 is about 933.5585965488.

The spelling of 813625867 in words is "eight hundred thirteen million, six hundred twenty-five thousand, eight hundred sixty-seven".