392879617 has 8 divisors (see below), whose sum is σ = 437691240. Its totient is φ = 350152320.

The previous prime is 392879603. The next prime is 392879621. The reversal of 392879617 is 716978293.

It can be written as a sum of positive squares in 4 ways, for example, as 998001 + 391881616 = 999^2 + 19796^2 .

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 392879617 - 2⁷ = 392879489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (392879117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520684 + ... + 521437.

It is an arithmetic number, because the mean of its divisors is an integer number (54711405).

Almost surely, 2^392879617 is an apocalyptic number.

It is an amenable number.

392879617 is a deficient number, since it is larger than the sum of its proper divisors (44811623).

392879617 is a wasteful number, since it uses less digits than its factorization.

392879617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042163.

The product of its digits is 1143072, while the sum is 52.

The square root of 392879617 is about 19821.1911095171. The cubic root of 392879617 is about 732.4081459058.

The spelling of 392879617 in words is "three hundred ninety-two million, eight hundred seventy-nine thousand, six hundred seventeen".