79223561 has 2 divisors, whose sum is σ = 79223562. Its totient is φ = 79223560.

The previous prime is 79223539. The next prime is 79223581. The reversal of 79223561 is 16532297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52649536 + 26574025 = 7256^2 + 5155^2 .

It is a cyclic number.

It is not a de Polignac number, because 79223561 - 2¹⁸ = 78961417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79223581) 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, 39611780 + 39611781.

It is an arithmetic number, because the mean of its divisors is an integer number (39611781).

Almost surely, 2^79223561 is an apocalyptic number.

It is an amenable number.

79223561 is a deficient number, since it is larger than the sum of its proper divisors (1).

79223561 is an equidigital number, since it uses as much as digits as its factorization.

79223561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 79223561 is about 8900.7618213274. The cubic root of 79223561 is about 429.4884144861.

The spelling of 79223561 in words is "seventy-nine million, two hundred twenty-three thousand, five hundred sixty-one".