172113756 has 12 divisors (see below), whose sum is σ = 401598792. Its totient is φ = 57371248.

The previous prime is 172113749. The next prime is 172113817. The reversal of 172113756 is 657311271.

172113756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7171395 + ... + 7171418.

It is an arithmetic number, because the mean of its divisors is an integer number (33466566).

Almost surely, 2^172113756 is an apocalyptic number.

It is an amenable number.

172113756 is an abundant number, since it is smaller than the sum of its proper divisors (229485036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172113756 is a wasteful number, since it uses less digits than its factorization.

172113756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14342820 (or 14342818 counting only the distinct ones).

The product of its digits is 8820, while the sum is 33.

The square root of 172113756 is about 13119.2132386054. The cubic root of 172113756 is about 556.2523525381.

The spelling of 172113756 in words is "one hundred seventy-two million, one hundred thirteen thousand, seven hundred fifty-six".