392979 has 8 divisors (see below), whose sum is σ = 542160. Its totient is φ = 252896.

The previous prime is 392969. The next prime is 392981. The reversal of 392979 is 979293.

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

It is a cyclic number.

It is not a de Polignac number, because 392979 - 2⁴ = 392963 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 392979.

It is not an unprimeable number, because it can be changed into a prime (392929) 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, 2172 + ... + 2345.

It is an arithmetic number, because the mean of its divisors is an integer number (67770).

2³⁹²⁹⁷⁹ is an apocalyptic number.

392979 is a deficient number, since it is larger than the sum of its proper divisors (149181).

392979 is a wasteful number, since it uses less digits than its factorization.

392979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4549.

The product of its digits is 30618, while the sum is 39.

The square root of 392979 is about 626.8803713628. The cubic root of 392979 is about 73.2469897461.

The spelling of 392979 in words is "three hundred ninety-two thousand, nine hundred seventy-nine".