79995117122087 has 2 divisors, whose sum is σ = 79995117122088. Its totient is φ = 79995117122086.

The previous prime is 79995117121963. The next prime is 79995117122099. The reversal of 79995117122087 is 78022171159997.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79995117122087 - 2⁸ = 79995117121831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79995117122287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39997558561043 + 39997558561044.

It is an arithmetic number, because the mean of its divisors is an integer number (39997558561044).

Almost surely, 2^{79995117122087} is an apocalyptic number.

79995117122087 is a deficient number, since it is larger than the sum of its proper divisors (1).

79995117122087 is an equidigital number, since it uses as much as digits as its factorization.

79995117122087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40007520, while the sum is 68.

The spelling of 79995117122087 in words is "seventy-nine trillion, nine hundred ninety-five billion, one hundred seventeen million, one hundred twenty-two thousand, eighty-seven".