390913 has 4 divisors (see below), whose sum is σ = 400048. Its totient is φ = 381780.

The previous prime is 390893. The next prime is 390953. The reversal of 390913 is 319093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 390913 - 2¹⁷ = 259841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390953) 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, 4503 + ... + 4588.

It is an arithmetic number, because the mean of its divisors is an integer number (100012).

2³⁹⁰⁹¹³ is an apocalyptic number.

It is an amenable number.

390913 is a deficient number, since it is larger than the sum of its proper divisors (9135).

390913 is an equidigital number, since it uses as much as digits as its factorization.

390913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 390913 is about 625.2303575483. The cubic root of 390913 is about 73.1184042070.

The spelling of 390913 in words is "three hundred ninety thousand, nine hundred thirteen".