79275569 has 2 divisors, whose sum is σ = 79275570. Its totient is φ = 79275568.

The previous prime is 79275533. The next prime is 79275577. The reversal of 79275569 is 96557297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78145600 + 1129969 = 8840^2 + 1063^2 .

It is a cyclic number.

It is not a de Polignac number, because 79275569 - 2¹² = 79271473 is a prime.

It is a super-2 number, since 2×79275569² = 12569231680547522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79275769) 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, 39637784 + 39637785.

It is an arithmetic number, because the mean of its divisors is an integer number (39637785).

Almost surely, 2^79275569 is an apocalyptic number.

It is an amenable number.

79275569 is a deficient number, since it is larger than the sum of its proper divisors (1).

79275569 is an equidigital number, since it uses as much as digits as its factorization.

79275569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1190700, while the sum is 50.

The square root of 79275569 is about 8903.6828896811. The cubic root of 79275569 is about 429.5823762113.

The spelling of 79275569 in words is "seventy-nine million, two hundred seventy-five thousand, five hundred sixty-nine".