79298252521 has 2 divisors, whose sum is σ = 79298252522. Its totient is φ = 79298252520.

The previous prime is 79298252447. The next prime is 79298252531. The reversal of 79298252521 is 12525289297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51080972121 + 28217280400 = 226011^2 + 167980^2 .

It is an emirp because it is prime and its reverse (12525289297) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79298252521 is a prime.

It is not a weakly prime, because it can be changed into another prime (79298252531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39649126260 + 39649126261.

It is an arithmetic number, because the mean of its divisors is an integer number (39649126261).

Almost surely, 2^79298252521 is an apocalyptic number.

It is an amenable number.

79298252521 is a deficient number, since it is larger than the sum of its proper divisors (1).

79298252521 is an equidigital number, since it uses as much as digits as its factorization.

79298252521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 52.

The spelling of 79298252521 in words is "seventy-nine billion, two hundred ninety-eight million, two hundred fifty-two thousand, five hundred twenty-one".