389277631 has 4 divisors (see below), whose sum is σ = 391234000. Its totient is φ = 387321264.

The previous prime is 389277619. The next prime is 389277659. The reversal of 389277631 is 136772983.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389277631 - 2⁷ = 389277503 is a prime.

It is a super-2 number, since 2×389277631² = 303074147993944322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389277671) 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, 977886 + ... + 978283.

It is an arithmetic number, because the mean of its divisors is an integer number (97808500).

Almost surely, 2^389277631 is an apocalyptic number.

389277631 is a deficient number, since it is larger than the sum of its proper divisors (1956369).

389277631 is a wasteful number, since it uses less digits than its factorization.

389277631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956368.

The product of its digits is 381024, while the sum is 46.

The square root of 389277631 is about 19730.1198931988. The cubic root of 389277631 is about 730.1629904400.

The spelling of 389277631 in words is "three hundred eighty-nine million, two hundred seventy-seven thousand, six hundred thirty-one".