79207897 has 2 divisors, whose sum is σ = 79207898. Its totient is φ = 79207896.

The previous prime is 79207871. The next prime is 79207901. The reversal of 79207897 is 79870297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68079001 + 11128896 = 8251^2 + 3336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79207897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79207897.

It is not a weakly prime, because it can be changed into another prime (79207867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39603948 + 39603949.

It is an arithmetic number, because the mean of its divisors is an integer number (39603949).

Almost surely, 2^79207897 is an apocalyptic number.

It is an amenable number.

79207897 is a deficient number, since it is larger than the sum of its proper divisors (1).

79207897 is an equidigital number, since it uses as much as digits as its factorization.

79207897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 79207897 is about 8899.8818531484. The cubic root of 79207897 is about 429.4601066196.

The spelling of 79207897 in words is "seventy-nine million, two hundred seven thousand, eight hundred ninety-seven".