172913097 has 16 divisors (see below), whose sum is σ = 264252800. Its totient is φ = 98520192.

The previous prime is 172913093. The next prime is 172913107. The reversal of 172913097 is 790319271.

172913097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172913097 - 2² = 172913093 is a prime.

It is a super-2 number, since 2×172913097² = 59797878228262818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172913093) 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, 4468 + ... + 19125.

It is an arithmetic number, because the mean of its divisors is an integer number (16515800).

Almost surely, 2^172913097 is an apocalyptic number.

It is an amenable number.

172913097 is a deficient number, since it is larger than the sum of its proper divisors (91339703).

172913097 is a wasteful number, since it uses less digits than its factorization.

172913097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23952.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 172913097 is about 13149.6424666224. The cubic root of 172913097 is about 557.1121496835.

The spelling of 172913097 in words is "one hundred seventy-two million, nine hundred thirteen thousand, ninety-seven".