172913994 has 32 divisors (see below), whose sum is σ = 419186880. Its totient is φ = 52398000.

The previous prime is 172913981. The next prime is 172913999. The reversal of 172913994 is 499319271.

172913994 is a `hidden beast` number, since 172 + 91 + 399 + 4 = 666.

172913994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172913999) 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, 144957 + ... + 146144.

It is an arithmetic number, because the mean of its divisors is an integer number (13099590).

Almost surely, 2^172913994 is an apocalyptic number.

172913994 is an abundant number, since it is smaller than the sum of its proper divisors (246272886).

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

172913994 is a wasteful number, since it uses less digits than its factorization.

172913994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291123 (or 291117 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 172913994 is about 13149.6765739694. The cubic root of 172913994 is about 557.1131130359.

The spelling of 172913994 in words is "one hundred seventy-two million, nine hundred thirteen thousand, nine hundred ninety-four".