390274217 has 4 divisors (see below), whose sum is σ = 394976400. Its totient is φ = 385572036.

The previous prime is 390274123. The next prime is 390274243. The reversal of 390274217 is 712472093.

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 390274217 - 2¹² = 390270121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390274267) 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, 2350967 + ... + 2351132.

It is an arithmetic number, because the mean of its divisors is an integer number (98744100).

Almost surely, 2^390274217 is an apocalyptic number.

It is an amenable number.

390274217 is a deficient number, since it is larger than the sum of its proper divisors (4702183).

390274217 is an equidigital number, since it uses as much as digits as its factorization.

390274217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4702182.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 390274217 is about 19755.3591969369. The cubic root of 390274217 is about 730.7855539358.

The spelling of 390274217 in words is "three hundred ninety million, two hundred seventy-four thousand, two hundred seventeen".