172893109867 has 2 divisors, whose sum is σ = 172893109868. Its totient is φ = 172893109866.

The previous prime is 172893109853. The next prime is 172893109877. The reversal of 172893109867 is 768901398271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172893109867 is a prime.

It is not a weakly prime, because it can be changed into another prime (172893109847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86446554933 + 86446554934.

It is an arithmetic number, because the mean of its divisors is an integer number (86446554934).

Almost surely, 2^172893109867 is an apocalyptic number.

172893109867 is a deficient number, since it is larger than the sum of its proper divisors (1).

172893109867 is an equidigital number, since it uses as much as digits as its factorization.

172893109867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9144576, while the sum is 61.

The spelling of 172893109867 in words is "one hundred seventy-two billion, eight hundred ninety-three million, one hundred nine thousand, eight hundred sixty-seven".