389655389 has 4 divisors (see below), whose sum is σ = 389697024. Its totient is φ = 389613756.

The previous prime is 389655341. The next prime is 389655407. The reversal of 389655389 is 983556983.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 389655389 - 2¹² = 389651293 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 (389655319) 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, 494 + ... + 27920.

It is an arithmetic number, because the mean of its divisors is an integer number (97424256).

Almost surely, 2^389655389 is an apocalyptic number.

It is an amenable number.

389655389 is a deficient number, since it is larger than the sum of its proper divisors (41635).

389655389 is a wasteful number, since it uses less digits than its factorization.

389655389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41634.

The product of its digits is 6998400, while the sum is 56.

The square root of 389655389 is about 19739.6907017309. The cubic root of 389655389 is about 730.3990993386.

The spelling of 389655389 in words is "three hundred eighty-nine million, six hundred fifty-five thousand, three hundred eighty-nine".