172317955 has 8 divisors (see below), whose sum is σ = 215772192. Its totient is φ = 131860608.

The previous prime is 172317953. The next prime is 172317961. The reversal of 172317955 is 559713271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172317955 - 2¹ = 172317953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172317953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749094 + ... + 749323.

It is an arithmetic number, because the mean of its divisors is an integer number (26971524).

Almost surely, 2^172317955 is an apocalyptic number.

172317955 is a deficient number, since it is larger than the sum of its proper divisors (43454237).

172317955 is a wasteful number, since it uses less digits than its factorization.

172317955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498445.

The product of its digits is 66150, while the sum is 40.

The square root of 172317955 is about 13126.9933724368. The cubic root of 172317955 is about 556.4722483522.

The spelling of 172317955 in words is "one hundred seventy-two million, three hundred seventeen thousand, nine hundred fifty-five".