389649479 has 4 divisors (see below), whose sum is σ = 400180584. Its totient is φ = 379118376.

The previous prime is 389649467. The next prime is 389649487. The reversal of 389649479 is 974946983.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389649479 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 (389649419) 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, 5265497 + ... + 5265570.

It is an arithmetic number, because the mean of its divisors is an integer number (100045146).

Almost surely, 2^389649479 is an apocalyptic number.

389649479 is a deficient number, since it is larger than the sum of its proper divisors (10531105).

389649479 is a wasteful number, since it uses less digits than its factorization.

389649479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10531104.

The product of its digits is 11757312, while the sum is 59.

The square root of 389649479 is about 19739.5410027690. The cubic root of 389649479 is about 730.3954066051.

The spelling of 389649479 in words is "three hundred eighty-nine million, six hundred forty-nine thousand, four hundred seventy-nine".