172863139 has 16 divisors (see below), whose sum is σ = 180843520. Its totient is φ = 165110400.

The previous prime is 172863137. The next prime is 172863143. The reversal of 172863139 is 931368271.

It is a cyclic number.

It is not a de Polignac number, because 172863139 - 2¹ = 172863137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172863137) 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, 512779 + ... + 513115.

It is an arithmetic number, because the mean of its divisors is an integer number (11302720).

Almost surely, 2^172863139 is an apocalyptic number.

172863139 is a deficient number, since it is larger than the sum of its proper divisors (7980381).

172863139 is a wasteful number, since it uses less digits than its factorization.

172863139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610.

The product of its digits is 54432, while the sum is 40.

The square root of 172863139 is about 13147.7427340209. The cubic root of 172863139 is about 557.0584909573.

The spelling of 172863139 in words is "one hundred seventy-two million, eight hundred sixty-three thousand, one hundred thirty-nine".