2579221913 has 2 divisors, whose sum is σ = 2579221914. Its totient is φ = 2579221912.

The previous prime is 2579221907. The next prime is 2579221933. The reversal of 2579221913 is 3191229752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1534445584 + 1044776329 = 39172^2 + 32323^2 .

It is a cyclic number.

It is not a de Polignac number, because 2579221913 - 2⁶ = 2579221849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2579221903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289610956 + 1289610957.

It is an arithmetic number, because the mean of its divisors is an integer number (1289610957).

Almost surely, 2^2579221913 is an apocalyptic number.

It is an amenable number.

2579221913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2579221913 is an equidigital number, since it uses as much as digits as its factorization.

2579221913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 2579221913 is about 50786.0405328078. The cubic root of 2579221913 is about 1371.3960785947.

The spelling of 2579221913 in words is "two billion, five hundred seventy-nine million, two hundred twenty-one thousand, nine hundred thirteen".