2566939 has 2 divisors, whose sum is σ = 2566940. Its totient is φ = 2566938.

The previous prime is 2566931. The next prime is 2566981. The reversal of 2566939 is 9396652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2566939 - 2³ = 2566931 is a prime.

It is not a weakly prime, because it can be changed into another prime (2566931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283469 + 1283470.

It is an arithmetic number, because the mean of its divisors is an integer number (1283470).

2^2566939 is an apocalyptic number.

2566939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566939 is an equidigital number, since it uses as much as digits as its factorization.

2566939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 40.

The square root of 2566939 is about 1602.1669700752. The cubic root of 2566939 is about 136.9215634271.

The spelling of 2566939 in words is "two million, five hundred sixty-six thousand, nine hundred thirty-nine".