289388979 has 12 divisors (see below), whose sum is σ = 456007032. Its totient is φ = 175387200.

The previous prime is 289388969. The next prime is 289388987. The reversal of 289388979 is 979883982.

It is not a de Polignac number, because 289388979 - 2⁴ = 289388963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289388959) 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, 1461462 + ... + 1461659.

It is an arithmetic number, because the mean of its divisors is an integer number (38000586).

Almost surely, 2^289388979 is an apocalyptic number.

289388979 is a deficient number, since it is larger than the sum of its proper divisors (166618053).

289388979 is a wasteful number, since it uses less digits than its factorization.

289388979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923138 (or 2923135 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The square root of 289388979 is about 17011.4367118124. The cubic root of 289388979 is about 661.4453929004.

The spelling of 289388979 in words is "two hundred eighty-nine million, three hundred eighty-eight thousand, nine hundred seventy-nine".