2569939 has 2 divisors, whose sum is σ = 2569940. Its totient is φ = 2569938.

The previous prime is 2569937. The next prime is 2569943. The reversal of 2569939 is 9399652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2569939 - 2¹ = 2569937 is a prime.

Together with 2569937, it forms a pair of twin primes.

It is an Ulam number.

2569939 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2569895 and 2569904.

It is not a weakly prime, because it can be changed into another prime (2569937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284969 + 1284970.

It is an arithmetic number, because the mean of its divisors is an integer number (1284970).

2^2569939 is an apocalyptic number.

2569939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2569939 is an equidigital number, since it uses as much as digits as its factorization.

2569939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 43.

The square root of 2569939 is about 1603.1029286980. The cubic root of 2569939 is about 136.9748830648.

The spelling of 2569939 in words is "two million, five hundred sixty-nine thousand, nine hundred thirty-nine".