172664911 has 2 divisors, whose sum is σ = 172664912. Its totient is φ = 172664910.

The previous prime is 172664893. The next prime is 172664923. The reversal of 172664911 is 119466271.

It is a strong prime.

It is an emirp because it is prime and its reverse (119466271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172664911 - 2⁵ = 172664879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172664411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86332455 + 86332456.

It is an arithmetic number, because the mean of its divisors is an integer number (86332456).

Almost surely, 2^172664911 is an apocalyptic number.

172664911 is a deficient number, since it is larger than the sum of its proper divisors (1).

172664911 is an equidigital number, since it uses as much as digits as its factorization.

172664911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 172664911 is about 13140.2020912922. The cubic root of 172664911 is about 556.8454769176.

The spelling of 172664911 in words is "one hundred seventy-two million, six hundred sixty-four thousand, nine hundred eleven".