2685979 has 4 divisors (see below), whose sum is σ = 2693376. Its totient is φ = 2678584.

The previous prime is 2685971. The next prime is 2685989. The reversal of 2685979 is 9795862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9795862 = 2 ⋅4897931.

It is a cyclic number.

It is not a de Polignac number, because 2685979 - 2³ = 2685971 is a prime.

It is a Duffinian number.

2685979 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685971) 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, 3124 + ... + 3889.

It is an arithmetic number, because the mean of its divisors is an integer number (673344).

2^2685979 is an apocalyptic number.

2685979 is a deficient number, since it is larger than the sum of its proper divisors (7397).

2685979 is an equidigital number, since it uses as much as digits as its factorization.

2685979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7396.

The product of its digits is 272160, while the sum is 46.

The square root of 2685979 is about 1638.8956647694. The cubic root of 2685979 is about 139.0062105812.

The spelling of 2685979 in words is "two million, six hundred eighty-five thousand, nine hundred seventy-nine".