9172979 has 8 divisors (see below), whose sum is σ = 9771840. Its totient is φ = 8580736.

The previous prime is 9172967. The next prime is 9172981. The reversal of 9172979 is 9792719.

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-9172979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9172949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1382 + ... + 4500.

It is an arithmetic number, because the mean of its divisors is an integer number (1221480).

Almost surely, 2^9172979 is an apocalyptic number.

9172979 is a deficient number, since it is larger than the sum of its proper divisors (598861).

9172979 is a wasteful number, since it uses less digits than its factorization.

9172979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309.

The product of its digits is 71442, while the sum is 44.

The square root of 9172979 is about 3028.6926222382. The cubic root of 9172979 is about 209.3325672977.

The spelling of 9172979 in words is "nine million, one hundred seventy-two thousand, nine hundred seventy-nine".