79928897 has 2 divisors, whose sum is σ = 79928898. Its totient is φ = 79928896.

The previous prime is 79928879. The next prime is 79928921. The reversal of 79928897 is 79882997.

Together with previous prime (79928879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42523441 + 37405456 = 6521^2 + 6116^2 .

It is a cyclic number.

It is not a de Polignac number, because 79928897 - 2⁶ = 79928833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79928867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39964448 + 39964449.

It is an arithmetic number, because the mean of its divisors is an integer number (39964449).

Almost surely, 2^79928897 is an apocalyptic number.

It is an amenable number.

79928897 is a deficient number, since it is larger than the sum of its proper divisors (1).

79928897 is an equidigital number, since it uses as much as digits as its factorization.

79928897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 59.

The square root of 79928897 is about 8940.2962478880. The cubic root of 79928897 is about 430.7592445266.

The spelling of 79928897 in words is "seventy-nine million, nine hundred twenty-eight thousand, eight hundred ninety-seven".