172708925 has 6 divisors (see below), whose sum is σ = 214159098. Its totient is φ = 138167120.

The previous prime is 172708919. The next prime is 172708937. The reversal of 172708925 is 529807271.

172708925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 3136441 + 169572484 = 1771^2 + 13022^2 .

It is not a de Polignac number, because 172708925 - 2¹⁰ = 172707901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3454154 + ... + 3454203.

It is an arithmetic number, because the mean of its divisors is an integer number (35693183).

Almost surely, 2^172708925 is an apocalyptic number.

It is an amenable number.

172708925 is a deficient number, since it is larger than the sum of its proper divisors (41450173).

172708925 is an equidigital number, since it uses as much as digits as its factorization.

172708925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6908367 (or 6908362 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 172708925 is about 13141.8767685594. The cubic root of 172708925 is about 556.8927880445.

The spelling of 172708925 in words is "one hundred seventy-two million, seven hundred eight thousand, nine hundred twenty-five".