2563249309 has 2 divisors, whose sum is σ = 2563249310. Its totient is φ = 2563249308.

The previous prime is 2563249279. The next prime is 2563249319. The reversal of 2563249309 is 9039423652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1984702500 + 578546809 = 44550^2 + 24053^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563249309 - 2⁷ = 2563249181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2563249319) 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, 1281624654 + 1281624655.

It is an arithmetic number, because the mean of its divisors is an integer number (1281624655).

Almost surely, 2^2563249309 is an apocalyptic number.

It is an amenable number.

2563249309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563249309 is an equidigital number, since it uses as much as digits as its factorization.

2563249309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 2563249309 is about 50628.5424340855. The cubic root of 2563249309 is about 1368.5592876659.

The spelling of 2563249309 in words is "two billion, five hundred sixty-three million, two hundred forty-nine thousand, three hundred nine".