2569891 has 2 divisors, whose sum is σ = 2569892. Its totient is φ = 2569890.

The previous prime is 2569841. The next prime is 2569927. The reversal of 2569891 is 1989652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2569891 - 2¹⁷ = 2438819 is a prime.

It is not a weakly prime, because it can be changed into another prime (2569841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284945 + 1284946.

It is an arithmetic number, because the mean of its divisors is an integer number (1284946).

2^2569891 is an apocalyptic number.

2569891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2569891 is an equidigital number, since it uses as much as digits as its factorization.

2569891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 2569891 is about 1603.0879576617. The cubic root of 2569891 is about 136.9740302774.

The spelling of 2569891 in words is "two million, five hundred sixty-nine thousand, eight hundred ninety-one".