172038839 has 8 divisors (see below), whose sum is σ = 197823360. Its totient is φ = 146556216.

The previous prime is 172038833. The next prime is 172038859. The reversal of 172038839 is 938830271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172038839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172038796 and 172038805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172038833) 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 7 ways as a sum of consecutive naturals, for example, 74249 + ... + 76530.

It is an arithmetic number, because the mean of its divisors is an integer number (24727920).

Almost surely, 2^172038839 is an apocalyptic number.

172038839 is a deficient number, since it is larger than the sum of its proper divisors (25784521).

172038839 is a wasteful number, since it uses less digits than its factorization.

172038839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150949.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 172038839 is about 13116.3576880169. The cubic root of 172038839 is about 556.1716330452.

The spelling of 172038839 in words is "one hundred seventy-two million, thirty-eight thousand, eight hundred thirty-nine".