79722553 has 2 divisors, whose sum is σ = 79722554. Its totient is φ = 79722552.

The previous prime is 79722541. The next prime is 79722589. The reversal of 79722553 is 35522797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69755904 + 9966649 = 8352^2 + 3157^2 .

It is a cyclic number.

It is not a de Polignac number, because 79722553 - 2¹⁷ = 79591481 is a prime.

It is not a weakly prime, because it can be changed into another prime (79722523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39861276 + 39861277.

It is an arithmetic number, because the mean of its divisors is an integer number (39861277).

Almost surely, 2^79722553 is an apocalyptic number.

It is an amenable number.

79722553 is a deficient number, since it is larger than the sum of its proper divisors (1).

79722553 is an equidigital number, since it uses as much as digits as its factorization.

79722553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132300, while the sum is 40.

The square root of 79722553 is about 8928.7486805263. The cubic root of 79722553 is about 430.3882431877.

The spelling of 79722553 in words is "seventy-nine million, seven hundred twenty-two thousand, five hundred fifty-three".