392939 has 4 divisors (see below), whose sum is σ = 413640. Its totient is φ = 372240.

The previous prime is 392929. The next prime is 392957. The reversal of 392939 is 939293.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 392939 - 2⁴ = 392923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 392899 and 392908.

It is not an unprimeable number, because it can be changed into a prime (392929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10322 + ... + 10359.

It is an arithmetic number, because the mean of its divisors is an integer number (103410).

2³⁹²⁹³⁹ is an apocalyptic number.

392939 is a deficient number, since it is larger than the sum of its proper divisors (20701).

392939 is a wasteful number, since it uses less digits than its factorization.

392939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20700.

The product of its digits is 13122, while the sum is 35.

The square root of 392939 is about 626.8484665372. The cubic root of 392939 is about 73.2445044742.

It can be divided in two parts, 392 and 939, that added together give a palindrome (1331).

The spelling of 392939 in words is "three hundred ninety-two thousand, nine hundred thirty-nine".