172159839 has 6 divisors (see below), whose sum is σ = 248675336. Its totient is φ = 114773220.

The previous prime is 172159829. The next prime is 172159843. The reversal of 172159839 is 938951271.

172159839 is a `hidden beast` number, since 1 + 7 + 21 + 598 + 39 = 666.

It is not a de Polignac number, because 172159839 - 2⁷ = 172159711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172159794 and 172159803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172159829) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9564427 + ... + 9564444.

Almost surely, 2^172159839 is an apocalyptic number.

172159839 is a deficient number, since it is larger than the sum of its proper divisors (76515497).

172159839 is a wasteful number, since it uses less digits than its factorization.

172159839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19128877 (or 19128874 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 172159839 is about 13120.9694382694. The cubic root of 172159839 is about 556.3019931369.

The spelling of 172159839 in words is "one hundred seventy-two million, one hundred fifty-nine thousand, eight hundred thirty-nine".