2979857 has 12 divisors (see below), whose sum is σ = 3211824. Its totient is φ = 2762760.

The previous prime is 2979841. The next prime is 2979863. The reversal of 2979857 is 7589792.

It is not a de Polignac number, because 2979857 - 2⁴ = 2979841 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2979817) 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, 22682 + ... + 22812.

It is an arithmetic number, because the mean of its divisors is an integer number (267652).

2^2979857 is an apocalyptic number.

It is an amenable number.

2979857 is a deficient number, since it is larger than the sum of its proper divisors (231967).

2979857 is a wasteful number, since it uses less digits than its factorization.

2979857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 197 counting only the distinct ones).

The product of its digits is 317520, while the sum is 47.

The square root of 2979857 is about 1726.2262308284. The cubic root of 2979857 is about 143.9014404017.

The spelling of 2979857 in words is "two million, nine hundred seventy-nine thousand, eight hundred fifty-seven".