813172667 has 2 divisors, whose sum is σ = 813172668. Its totient is φ = 813172666.

The previous prime is 813172651. The next prime is 813172729. The reversal of 813172667 is 766271318.

813172667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 813172667 - 2⁴ = 813172651 is a prime.

It is a super-2 number, since 2×813172667² = 1322499572711785778, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (813172637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406586333 + 406586334.

It is an arithmetic number, because the mean of its divisors is an integer number (406586334).

Almost surely, 2^813172667 is an apocalyptic number.

813172667 is a deficient number, since it is larger than the sum of its proper divisors (1).

813172667 is an equidigital number, since it uses as much as digits as its factorization.

813172667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 813172667 is about 28516.1825460562. The cubic root of 813172667 is about 933.3852296682.

The spelling of 813172667 in words is "eight hundred thirteen million, one hundred seventy-two thousand, six hundred sixty-seven".