172882979 has 12 divisors (see below), whose sum is σ = 187132464. Its totient is φ = 159629184.

The previous prime is 172882961. The next prime is 172882987. The reversal of 172882979 is 979288271.

It is a happy number.

It is not a de Polignac number, because 172882979 - 2¹² = 172878883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a self number, because there is not a number n which added to its sum of digits gives 172882979.

It is not an unprimeable number, because it can be changed into a prime (172882999) 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, 9674 + ... + 20960.

It is an arithmetic number, because the mean of its divisors is an integer number (15594372).

Almost surely, 2^172882979 is an apocalyptic number.

172882979 is a deficient number, since it is larger than the sum of its proper divisors (14249485).

172882979 is a wasteful number, since it uses less digits than its factorization.

172882979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11374 (or 11357 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 53.

The square root of 172882979 is about 13148.4972145109. The cubic root of 172882979 is about 557.0798018774.

The spelling of 172882979 in words is "one hundred seventy-two million, eight hundred eighty-two thousand, nine hundred seventy-nine".