79895521 has 2 divisors, whose sum is σ = 79895522. Its totient is φ = 79895520.

The previous prime is 79895503. The next prime is 79895527. The reversal of 79895521 is 12559897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67568400 + 12327121 = 8220^2 + 3511^2 .

It is a cyclic number.

It is not a de Polignac number, because 79895521 - 2¹⁷ = 79764449 is a prime.

It is a super-2 number, since 2×79895521² = 12766588551722882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79895527) 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, 39947760 + 39947761.

It is an arithmetic number, because the mean of its divisors is an integer number (39947761).

Almost surely, 2^79895521 is an apocalyptic number.

It is an amenable number.

79895521 is a deficient number, since it is larger than the sum of its proper divisors (1).

79895521 is an equidigital number, since it uses as much as digits as its factorization.

79895521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 46.

The square root of 79895521 is about 8938.4294481749. The cubic root of 79895521 is about 430.6992786374.

The spelling of 79895521 in words is "seventy-nine million, eight hundred ninety-five thousand, five hundred twenty-one".