396139 has 4 divisors (see below), whose sum is σ = 400680. Its totient is φ = 391600.

The previous prime is 396119. The next prime is 396157. The reversal of 396139 is 931693.

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

It is not a de Polignac number, because 396139 - 2⁵ = 396107 is a prime.

It is a super-2 number, since 2×396139² = 313852214642, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 396139.

It is not an unprimeable number, because it can be changed into a prime (396119) 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, 2137 + ... + 2314.

It is an arithmetic number, because the mean of its divisors is an integer number (100170).

2³⁹⁶¹³⁹ is an apocalyptic number.

396139 is a deficient number, since it is larger than the sum of its proper divisors (4541).

396139 is an equidigital number, since it uses as much as digits as its factorization.

396139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540.

The product of its digits is 4374, while the sum is 31.

The square root of 396139 is about 629.3957419621. The cubic root of 396139 is about 73.4427956646.

It can be divided in two parts, 396 and 139, that added together give a palindrome (535).

The spelling of 396139 in words is "three hundred ninety-six thousand, one hundred thirty-nine".