172109707 has 12 divisors (see below), whose sum is σ = 218410776. Its totient is φ = 134111040.

The previous prime is 172109701. The next prime is 172109711. The reversal of 172109707 is 707901271.

It is not a de Polignac number, because 172109707 - 2⁷ = 172109579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172109701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159118 + ... + 160195.

It is an arithmetic number, because the mean of its divisors is an integer number (18200898).

Almost surely, 2^172109707 is an apocalyptic number.

172109707 is a deficient number, since it is larger than the sum of its proper divisors (46301069).

172109707 is a wasteful number, since it uses less digits than its factorization.

172109707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319338 (or 319331 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 34.

The square root of 172109707 is about 13119.0589220416. The cubic root of 172109707 is about 556.2479905327.

The spelling of 172109707 in words is "one hundred seventy-two million, one hundred nine thousand, seven hundred seven".