79564549 has 2 divisors, whose sum is σ = 79564550. Its totient is φ = 79564548.

The previous prime is 79564493. The next prime is 79564579. The reversal of 79564549 is 94546597.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54863649 + 24700900 = 7407^2 + 4970^2 .

It is a cyclic number.

It is not a de Polignac number, because 79564549 - 2¹³ = 79556357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79564579) 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, 39782274 + 39782275.

It is an arithmetic number, because the mean of its divisors is an integer number (39782275).

Almost surely, 2^79564549 is an apocalyptic number.

It is an amenable number.

79564549 is a deficient number, since it is larger than the sum of its proper divisors (1).

79564549 is an equidigital number, since it uses as much as digits as its factorization.

79564549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 49.

The square root of 79564549 is about 8919.8962437912. The cubic root of 79564549 is about 430.1037229502.

The spelling of 79564549 in words is "seventy-nine million, five hundred sixty-four thousand, five hundred forty-nine".