172166123 has 16 divisors (see below), whose sum is σ = 187536384. Its totient is φ = 157430400.

The previous prime is 172166117. The next prime is 172166149. The reversal of 172166123 is 321661271.

172166123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 172166123 - 2¹² = 172162027 is a prime.

It is a super-2 number, since 2×172166123² = 59282347817702258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172166723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119936 + ... + 121362.

It is an arithmetic number, because the mean of its divisors is an integer number (11721024).

Almost surely, 2^172166123 is an apocalyptic number.

172166123 is a deficient number, since it is larger than the sum of its proper divisors (15370261).

172166123 is a wasteful number, since it uses less digits than its factorization.

172166123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642.

The product of its digits is 3024, while the sum is 29.

The square root of 172166123 is about 13121.2089000976. The cubic root of 172166123 is about 556.3087615741.

The spelling of 172166123 in words is "one hundred seventy-two million, one hundred sixty-six thousand, one hundred twenty-three".