172872999 has 12 divisors (see below), whose sum is σ = 268913736. Its totient is φ = 106383312.

The previous prime is 172872989. The next prime is 172873027. The reversal of 172872999 is 999278271.

It is not a de Polignac number, because 172872999 - 2⁷ = 172872871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172872989) 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, 738657 + ... + 738890.

It is an arithmetic number, because the mean of its divisors is an integer number (22409478).

Almost surely, 2^172872999 is an apocalyptic number.

172872999 is a deficient number, since it is larger than the sum of its proper divisors (96040737).

172872999 is a wasteful number, since it uses less digits than its factorization.

172872999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477566 (or 1477563 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 172872999 is about 13148.1176979825. The cubic root of 172872999 is about 557.0690821728.

The spelling of 172872999 in words is "one hundred seventy-two million, eight hundred seventy-two thousand, nine hundred ninety-nine".