389920717 has 4 divisors (see below), whose sum is σ = 410442880. Its totient is φ = 369398556.

The previous prime is 389920709. The next prime is 389920753. The reversal of 389920717 is 717029983.

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, and also an emirpimes, since its reverse is a distinct semiprime: 717029983 = 1193 ⋅601031.

It is a cyclic number.

It is not a de Polignac number, because 389920717 - 2³ = 389920709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389921717) 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, 10261053 + ... + 10261090.

It is an arithmetic number, because the mean of its divisors is an integer number (102610720).

Almost surely, 2^389920717 is an apocalyptic number.

It is an amenable number.

389920717 is a deficient number, since it is larger than the sum of its proper divisors (20522163).

389920717 is a wasteful number, since it uses less digits than its factorization.

389920717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20522162.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 389920717 is about 19746.4102307230. The cubic root of 389920717 is about 730.5648452492.

The spelling of 389920717 in words is "three hundred eighty-nine million, nine hundred twenty thousand, seven hundred seventeen".