172013979 has 8 divisors (see below), whose sum is σ = 229450320. Its totient is φ = 114626816.

The previous prime is 172013957. The next prime is 172014019. The reversal of 172013979 is 979310271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172013979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172013929) by changing a digit.

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, 3162 + ... + 18815.

It is an arithmetic number, because the mean of its divisors is an integer number (28681290).

Almost surely, 2^172013979 is an apocalyptic number.

172013979 is a deficient number, since it is larger than the sum of its proper divisors (57436341).

172013979 is a wasteful number, since it uses less digits than its factorization.

172013979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24589.

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 172013979 is about 13115.4099821546. The cubic root of 172013979 is about 556.1448424032.

The spelling of 172013979 in words is "one hundred seventy-two million, thirteen thousand, nine hundred seventy-nine".