172913839 has 16 divisors (see below), whose sum is σ = 211788288. Its totient is φ = 137931552.

The previous prime is 172913831. The next prime is 172913861. The reversal of 172913839 is 938319271.

It is not a de Polignac number, because 172913839 - 2³ = 172913831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172913795 and 172913804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172913831) 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, 8557 + ... + 20470.

It is an arithmetic number, because the mean of its divisors is an integer number (13236768).

Almost surely, 2^172913839 is an apocalyptic number.

172913839 is a deficient number, since it is larger than the sum of its proper divisors (38874449).

172913839 is a wasteful number, since it uses less digits than its factorization.

172913839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29094.

The product of its digits is 81648, while the sum is 43.

The square root of 172913839 is about 13149.6706802870. The cubic root of 172913839 is about 557.1129465706.

The spelling of 172913839 in words is "one hundred seventy-two million, nine hundred thirteen thousand, eight hundred thirty-nine".