172158023 has 2 divisors, whose sum is σ = 172158024. Its totient is φ = 172158022.

The previous prime is 172158001. The next prime is 172158029. The reversal of 172158023 is 320851271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172158023 - 2²⁶ = 105049159 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172158029) 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, 86079011 + 86079012.

It is an arithmetic number, because the mean of its divisors is an integer number (86079012).

Almost surely, 2^172158023 is an apocalyptic number.

172158023 is a deficient number, since it is larger than the sum of its proper divisors (1).

172158023 is an equidigital number, since it uses as much as digits as its factorization.

172158023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 172158023 is about 13120.9002358832. The cubic root of 172158023 is about 556.3000371097.

The spelling of 172158023 in words is "one hundred seventy-two million, one hundred fifty-eight thousand, twenty-three".