172111797 has 84 divisors (see below), whose sum is σ = 307229184. Its totient is φ = 95528160.

The previous prime is 172111789. The next prime is 172111813. The reversal of 172111797 is 797111271.

It is a happy number.

172111797 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 172111797 - 2³ = 172111789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172118797) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 1355148 + ... + 1355274.

Almost surely, 2^172111797 is an apocalyptic number.

It is an amenable number.

172111797 is a deficient number, since it is larger than the sum of its proper divisors (135117387).

172111797 is a wasteful number, since it uses less digits than its factorization.

172111797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 154 counting only the distinct ones).

The product of its digits is 6174, while the sum is 36.

The square root of 172111797 is about 13119.1385769036. The cubic root of 172111797 is about 556.2502421074.

The spelling of 172111797 in words is "one hundred seventy-two million, one hundred eleven thousand, seven hundred ninety-seven".