389240617 has 4 divisors (see below), whose sum is σ = 391196800. Its totient is φ = 387284436.

The previous prime is 389240609. The next prime is 389240623. The reversal of 389240617 is 716042983.

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 389240617 - 2³ = 389240609 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 389240617.

It is not an unprimeable number, because it can be changed into a prime (389240627) 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, 977793 + ... + 978190.

It is an arithmetic number, because the mean of its divisors is an integer number (97799200).

Almost surely, 2^389240617 is an apocalyptic number.

It is an amenable number.

389240617 is a deficient number, since it is larger than the sum of its proper divisors (1956183).

389240617 is a wasteful number, since it uses less digits than its factorization.

389240617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956182.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 389240617 is about 19729.1818634225. The cubic root of 389240617 is about 730.1398474803.

The spelling of 389240617 in words is "three hundred eighty-nine million, two hundred forty thousand, six hundred seventeen".