172991298 has 16 divisors (see below), whose sum is σ = 346983840. Its totient is φ = 57496896.

The previous prime is 172991267. The next prime is 172991309. The reversal of 172991298 is 892199271.

It is an unprimeable number.

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, 39463 + ... + 43626.

It is an arithmetic number, because the mean of its divisors is an integer number (21686490).

Almost surely, 2^172991298 is an apocalyptic number.

172991298 is an abundant number, since it is smaller than the sum of its proper divisors (173992542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172991298 is a wasteful number, since it uses less digits than its factorization.

172991298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83441.

The product of its digits is 163296, while the sum is 48.

The square root of 172991298 is about 13152.6156334016. The cubic root of 172991298 is about 557.1961228119.

The spelling of 172991298 in words is "one hundred seventy-two million, nine hundred ninety-one thousand, two hundred ninety-eight".