392891 has 4 divisors (see below), whose sum is σ = 402072. Its totient is φ = 383712.

The previous prime is 392879. The next prime is 392893. The reversal of 392891 is 198293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198293 = 47 ⋅4219.

It is a cyclic number.

It is not a de Polignac number, because 392891 - 2⁶ = 392827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (392893) 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, 4526 + ... + 4611.

It is an arithmetic number, because the mean of its divisors is an integer number (100518).

2³⁹²⁸⁹¹ is an apocalyptic number.

392891 is a deficient number, since it is larger than the sum of its proper divisors (9181).

392891 is an equidigital number, since it uses as much as digits as its factorization.

392891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9180.

The product of its digits is 3888, while the sum is 32.

The square root of 392891 is about 626.8101786027. The cubic root of 392891 is about 73.2415219253.

The spelling of 392891 in words is "three hundred ninety-two thousand, eight hundred ninety-one".