390716617 has 4 divisors (see below), whose sum is σ = 407704320. Its totient is φ = 373728916.

The previous prime is 390716603. The next prime is 390716647. The reversal of 390716617 is 716617093.

It is a happy number.

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 390716617 - 2¹⁵ = 390683849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 390716617.

It is not an unprimeable number, because it can be changed into a prime (390716647) 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, 8493817 + ... + 8493862.

It is an arithmetic number, because the mean of its divisors is an integer number (101926080).

Almost surely, 2^390716617 is an apocalyptic number.

It is an amenable number.

390716617 is a deficient number, since it is larger than the sum of its proper divisors (16987703).

390716617 is a wasteful number, since it uses less digits than its factorization.

390716617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16987702.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 390716617 is about 19766.5529873066. The cubic root of 390716617 is about 731.0615798956.

The spelling of 390716617 in words is "three hundred ninety million, seven hundred sixteen thousand, six hundred seventeen".