172371379 has 2 divisors, whose sum is σ = 172371380. Its totient is φ = 172371378.

The previous prime is 172371349. The next prime is 172371383. The reversal of 172371379 is 973173271.

172371379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172371379 - 2²⁵ = 138816947 is a prime.

It is not a weakly prime, because it can be changed into another prime (172371319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86185689 + 86185690.

It is an arithmetic number, because the mean of its divisors is an integer number (86185690).

Almost surely, 2^172371379 is an apocalyptic number.

172371379 is a deficient number, since it is larger than the sum of its proper divisors (1).

172371379 is an equidigital number, since it uses as much as digits as its factorization.

172371379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55566, while the sum is 40.

The square root of 172371379 is about 13129.0281056901. The cubic root of 172371379 is about 556.5297503918.

The spelling of 172371379 in words is "one hundred seventy-two million, three hundred seventy-one thousand, three hundred seventy-nine".