172625389 has 2 divisors, whose sum is σ = 172625390. Its totient is φ = 172625388.

The previous prime is 172625359. The next prime is 172625417. The reversal of 172625389 is 983526271.

172625389 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 can be written as a sum of positive squares in only one way, i.e., 124434025 + 48191364 = 11155^2 + 6942^2 .

It is a cyclic number.

It is not a de Polignac number, because 172625389 - 2¹⁷ = 172494317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172625359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86312694 + 86312695.

It is an arithmetic number, because the mean of its divisors is an integer number (86312695).

Almost surely, 2^172625389 is an apocalyptic number.

It is an amenable number.

172625389 is a deficient number, since it is larger than the sum of its proper divisors (1).

172625389 is an equidigital number, since it uses as much as digits as its factorization.

172625389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 172625389 is about 13138.6981470768. The cubic root of 172625389 is about 556.8029874386.

The spelling of 172625389 in words is "one hundred seventy-two million, six hundred twenty-five thousand, three hundred eighty-nine".