390131 has 4 divisors (see below), whose sum is σ = 445872. Its totient is φ = 334392.

The previous prime is 390119. The next prime is 390151. The reversal of 390131 is 131093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131093 = 337 ⋅389.

It is a cyclic number.

It is not a de Polignac number, because 390131 - 2⁶ = 390067 is a prime.

It is a super-2 number, since 2×390131² = 304404394322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (390101) 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, 27860 + ... + 27873.

It is an arithmetic number, because the mean of its divisors is an integer number (111468).

2³⁹⁰¹³¹ is an apocalyptic number.

390131 is a deficient number, since it is larger than the sum of its proper divisors (55741).

390131 is an equidigital number, since it uses as much as digits as its factorization.

390131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55740.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 390131 is about 624.6046749745. The cubic root of 390131 is about 73.0696152079.

The spelling of 390131 in words is "three hundred ninety thousand, one hundred thirty-one".