2568739 has 2 divisors, whose sum is σ = 2568740. Its totient is φ = 2568738.

The previous prime is 2568719. The next prime is 2568757. The reversal of 2568739 is 9378652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2568739 - 2¹⁷ = 2437667 is a prime.

It is not a weakly prime, because it can be changed into another prime (2568719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284369 + 1284370.

It is an arithmetic number, because the mean of its divisors is an integer number (1284370).

2^2568739 is an apocalyptic number.

2568739 is a deficient number, since it is larger than the sum of its proper divisors (1).

2568739 is an equidigital number, since it uses as much as digits as its factorization.

2568739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 2568739 is about 1602.7286108384. The cubic root of 2568739 is about 136.9535601917.

The spelling of 2568739 in words is "two million, five hundred sixty-eight thousand, seven hundred thirty-nine".