79705897 has 2 divisors, whose sum is σ = 79705898. Its totient is φ = 79705896.

The previous prime is 79705861. The next prime is 79705909. The reversal of 79705897 is 79850797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79637776 + 68121 = 8924^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 79705897 - 2¹¹ = 79703849 is a prime.

It is a super-3 number, since 3×79705897³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (79705397) 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, 39852948 + 39852949.

It is an arithmetic number, because the mean of its divisors is an integer number (39852949).

Almost surely, 2^79705897 is an apocalyptic number.

It is an amenable number.

79705897 is a deficient number, since it is larger than the sum of its proper divisors (1).

79705897 is an equidigital number, since it uses as much as digits as its factorization.

79705897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The square root of 79705897 is about 8927.8159143208. The cubic root of 79705897 is about 430.3582682074.

The spelling of 79705897 in words is "seventy-nine million, seven hundred five thousand, eight hundred ninety-seven".