172859139 has 12 divisors (see below), whose sum is σ = 249950272. Its totient is φ = 115117200.

The previous prime is 172859039. The next prime is 172859143. The reversal of 172859139 is 931958271.

172859139 is a `hidden beast` number, since 1 + 7 + 28 + 591 + 39 = 666.

172859139 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 172859139 - 2¹² = 172855043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172859094 and 172859103.

It is not an unprimeable number, because it can be changed into a prime (172859039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 772 + ... + 18609.

Almost surely, 2^172859139 is an apocalyptic number.

172859139 is a deficient number, since it is larger than the sum of its proper divisors (77091133).

172859139 is a wasteful number, since it uses less digits than its factorization.

172859139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20378 (or 20375 counting only the distinct ones).

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

The square root of 172859139 is about 13147.5906157744. The cubic root of 172859139 is about 557.0541942033.

The spelling of 172859139 in words is "one hundred seventy-two million, eight hundred fifty-nine thousand, one hundred thirty-nine".