79880897 has 2 divisors, whose sum is σ = 79880898. Its totient is φ = 79880896.

The previous prime is 79880881. The next prime is 79880917. The reversal of 79880897 is 79808897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78127921 + 1752976 = 8839^2 + 1324^2 .

It is a cyclic number.

It is not a de Polignac number, because 79880897 - 2⁴ = 79880881 is a prime.

It is not a weakly prime, because it can be changed into another prime (79880797) 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, 39940448 + 39940449.

It is an arithmetic number, because the mean of its divisors is an integer number (39940449).

Almost surely, 2^79880897 is an apocalyptic number.

It is an amenable number.

79880897 is a deficient number, since it is larger than the sum of its proper divisors (1).

79880897 is an equidigital number, since it uses as much as digits as its factorization.

79880897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The square root of 79880897 is about 8937.6113699355. The cubic root of 79880897 is about 430.6729987721.

The spelling of 79880897 in words is "seventy-nine million, eight hundred eighty thousand, eight hundred ninety-seven".