102079775891 has 2 divisors, whose sum is σ = 102079775892. Its totient is φ = 102079775890.

The previous prime is 102079775869. The next prime is 102079775899. The reversal of 102079775891 is 198577970201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102079775891 is a prime.

It is not a weakly prime, because it can be changed into another prime (102079775899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51039887945 + 51039887946.

It is an arithmetic number, because the mean of its divisors is an integer number (51039887946).

Almost surely, 2^102079775891 is an apocalyptic number.

102079775891 is a deficient number, since it is larger than the sum of its proper divisors (1).

102079775891 is an equidigital number, since it uses as much as digits as its factorization.

102079775891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2222640, while the sum is 56.

The spelling of 102079775891 in words is "one hundred two billion, seventy-nine million, seven hundred seventy-five thousand, eight hundred ninety-one".