172171293 has 32 divisors (see below), whose sum is σ = 282071040. Its totient is φ = 91212480.

The previous prime is 172171253. The next prime is 172171297. The reversal of 172171293 is 392171271.

It is not a de Polignac number, because 172171293 - 2⁸ = 172171037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172171297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14163 + ... + 23343.

It is an arithmetic number, because the mean of its divisors is an integer number (8814720).

Almost surely, 2^172171293 is an apocalyptic number.

It is an amenable number.

172171293 is a deficient number, since it is larger than the sum of its proper divisors (109899747).

172171293 is a wasteful number, since it uses less digits than its factorization.

172171293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9257.

The product of its digits is 5292, while the sum is 33.

The square root of 172171293 is about 13121.4059079048. The cubic root of 172171293 is about 556.3143300090.

The spelling of 172171293 in words is "one hundred seventy-two million, one hundred seventy-one thousand, two hundred ninety-three".