2389979 has 4 divisors (see below), whose sum is σ = 2530584. Its totient is φ = 2249376.

The previous prime is 2389973. The next prime is 2389993. The reversal of 2389979 is 9799832.

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 2389979 - 2¹² = 2385883 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2389973) 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, 70277 + ... + 70310.

It is an arithmetic number, because the mean of its divisors is an integer number (632646).

2^2389979 is an apocalyptic number.

2389979 is a deficient number, since it is larger than the sum of its proper divisors (140605).

2389979 is a wasteful number, since it uses less digits than its factorization.

2389979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140604.

The product of its digits is 244944, while the sum is 47.

The square root of 2389979 is about 1545.9556914737. The cubic root of 2389979 is about 133.6999859586.

The spelling of 2389979 in words is "two million, three hundred eighty-nine thousand, nine hundred seventy-nine".