390217317 has 8 divisors (see below), whose sum is σ = 594616896. Its totient is φ = 222981312.

The previous prime is 390217297. The next prime is 390217351. The reversal of 390217317 is 713712093.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390217317 - 2⁶ = 390217253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390217397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9290868 + ... + 9290909.

It is an arithmetic number, because the mean of its divisors is an integer number (74327112).

Almost surely, 2^390217317 is an apocalyptic number.

It is an amenable number.

390217317 is a deficient number, since it is larger than the sum of its proper divisors (204399579).

390217317 is a wasteful number, since it uses less digits than its factorization.

390217317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18581787.

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 390217317 is about 19753.9190288915. The cubic root of 390217317 is about 730.7500372682.

The spelling of 390217317 in words is "three hundred ninety million, two hundred seventeen thousand, three hundred seventeen".