389657663 has 4 divisors (see below), whose sum is σ = 412578720. Its totient is φ = 366736608.

The previous prime is 389657657. The next prime is 389657687. The reversal of 389657663 is 366756983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366756983 = 17681 ⋅20743.

It is a cyclic number.

It is not a de Polignac number, because 389657663 - 2⁶ = 389657599 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 (389657363) 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, 11460503 + ... + 11460536.

It is an arithmetic number, because the mean of its divisors is an integer number (103144680).

Almost surely, 2^389657663 is an apocalyptic number.

389657663 is a deficient number, since it is larger than the sum of its proper divisors (22921057).

389657663 is a wasteful number, since it uses less digits than its factorization.

389657663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22921056.

The product of its digits is 4898880, while the sum is 53.

The square root of 389657663 is about 19739.7483013335. The cubic root of 389657663 is about 730.4005201875.

The spelling of 389657663 in words is "three hundred eighty-nine million, six hundred fifty-seven thousand, six hundred sixty-three".