172704939 has 16 divisors (see below), whose sum is σ = 251475840. Its totient is φ = 104557760.

The previous prime is 172704929. The next prime is 172704943. The reversal of 172704939 is 939407271.

It is a cyclic number.

It is not a de Polignac number, because 172704939 - 2⁴ = 172704923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172704939.

It is not an unprimeable number, because it can be changed into a prime (172704919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36967 + ... + 41375.

It is an arithmetic number, because the mean of its divisors is an integer number (15717240).

Almost surely, 2^172704939 is an apocalyptic number.

172704939 is a deficient number, since it is larger than the sum of its proper divisors (78770901).

172704939 is a wasteful number, since it uses less digits than its factorization.

172704939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 172704939 is about 13141.7251150677. The cubic root of 172704939 is about 556.8885037808. Note that the first 3 decimals are identical.

The spelling of 172704939 in words is "one hundred seventy-two million, seven hundred four thousand, nine hundred thirty-nine".