2579939 has 2 divisors, whose sum is σ = 2579940. Its totient is φ = 2579938.

The previous prime is 2579923. The next prime is 2579963. The reversal of 2579939 is 9399752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2579939 - 2⁴ = 2579923 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2579939.

It is not a weakly prime, because it can be changed into another prime (2579989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289969 + 1289970.

It is an arithmetic number, because the mean of its divisors is an integer number (1289970).

2^2579939 is an apocalyptic number.

2579939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2579939 is an equidigital number, since it uses as much as digits as its factorization.

2579939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 44.

The square root of 2579939 is about 1606.2188518381. The cubic root of 2579939 is about 137.1523160742.

The spelling of 2579939 in words is "two million, five hundred seventy-nine thousand, nine hundred thirty-nine".