390917 has 4 divisors (see below), whose sum is σ = 392256. Its totient is φ = 389580.

The previous prime is 390893. The next prime is 390953. The reversal of 390917 is 719093.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 719093 = 19 ⋅37847.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390917 is a prime.

It is a super-2 number, since 2×390917² = 305632201778, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 390917.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 390917.

It is not an unprimeable number, because it can be changed into a prime (390967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23 + ... + 884.

It is an arithmetic number, because the mean of its divisors is an integer number (98064).

2³⁹⁰⁹¹⁷ is an apocalyptic number.

It is an amenable number.

390917 is a deficient number, since it is larger than the sum of its proper divisors (1339).

390917 is an equidigital number, since it uses as much as digits as its factorization.

390917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 390917 is about 625.2335563611. The cubic root of 390917 is about 73.1186535998.

The spelling of 390917 in words is "three hundred ninety thousand, nine hundred seventeen".