389963817 has 12 divisors (see below), whose sum is σ = 563464564. Its totient is φ = 259891200.

The previous prime is 389963807. The next prime is 389963837. The reversal of 389963817 is 718369983.

It can be written as a sum of positive squares in 2 ways, for example, as 106007616 + 283956201 = 10296^2 + 16851^2 .

It is not a de Polignac number, because 389963817 - 2⁶ = 389963753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389963807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35817 + ... + 45417.

Almost surely, 2^389963817 is an apocalyptic number.

It is an amenable number.

389963817 is a deficient number, since it is larger than the sum of its proper divisors (173500747).

389963817 is a wasteful number, since it uses less digits than its factorization.

389963817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14120 (or 14117 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 389963817 is about 19747.5015381693. The cubic root of 389963817 is about 730.5917619901.

The spelling of 389963817 in words is "three hundred eighty-nine million, nine hundred sixty-three thousand, eight hundred seventeen".