79307897 has 2 divisors, whose sum is σ = 79307898. Its totient is φ = 79307896.

The previous prime is 79307861. The next prime is 79307947. The reversal of 79307897 is 79870397.

It is an a-pointer prime, because the next prime (79307947) can be obtained adding 79307897 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46635241 + 32672656 = 6829^2 + 5716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79307897 is a prime.

It is not a weakly prime, because it can be changed into another prime (79307597) 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, 39653948 + 39653949.

It is an arithmetic number, because the mean of its divisors is an integer number (39653949).

Almost surely, 2^79307897 is an apocalyptic number.

It is an amenable number.

79307897 is a deficient number, since it is larger than the sum of its proper divisors (1).

79307897 is an equidigital number, since it uses as much as digits as its factorization.

79307897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 79307897 is about 8905.4981331759. The cubic root of 79307897 is about 429.6407617977.

Subtracting 79307897 from its reverse (79870397), we obtain a square (562500 = 750²).

The spelling of 79307897 in words is "seventy-nine million, three hundred seven thousand, eight hundred ninety-seven".