172625407 has 4 divisors (see below), whose sum is σ = 176298336. Its totient is φ = 168952480.

The previous prime is 172625389. The next prime is 172625417. The reversal of 172625407 is 704526271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172625407 is a prime.

It is a super-2 number, since 2×172625407² = 59599062283831298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172625417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836394 + ... + 1836487.

It is an arithmetic number, because the mean of its divisors is an integer number (44074584).

Almost surely, 2^172625407 is an apocalyptic number.

172625407 is a deficient number, since it is larger than the sum of its proper divisors (3672929).

172625407 is an equidigital number, since it uses as much as digits as its factorization.

172625407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672928.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 172625407 is about 13138.6988320762. The cubic root of 172625407 is about 556.8030067916.

The spelling of 172625407 in words is "one hundred seventy-two million, six hundred twenty-five thousand, four hundred seven".