2309979 has 16 divisors (see below), whose sum is σ = 3541248. Its totient is φ = 1312032.

The previous prime is 2309969. The next prime is 2309999. The reversal of 2309979 is 9799032.

It is not a de Polignac number, because 2309979 - 2¹² = 2305883 is a prime.

2309979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2309969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6484 + ... + 6830.

It is an arithmetic number, because the mean of its divisors is an integer number (221328).

2^2309979 is an apocalyptic number.

2309979 is a deficient number, since it is larger than the sum of its proper divisors (1231269).

2309979 is a wasteful number, since it uses less digits than its factorization.

2309979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 2309979 is about 1519.8615068486. The cubic root of 2309979 is about 132.1912402465.

The spelling of 2309979 in words is "two million, three hundred nine thousand, nine hundred seventy-nine".