72127105979 has 2 divisors, whose sum is σ = 72127105980. Its totient is φ = 72127105978.

The previous prime is 72127105961. The next prime is 72127105993. The reversal of 72127105979 is 97950172127.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72127105979 is a prime.

It is not a weakly prime, because it can be changed into another prime (72127105909) 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, 36063552989 + 36063552990.

It is an arithmetic number, because the mean of its divisors is an integer number (36063552990).

Almost surely, 2^72127105979 is an apocalyptic number.

72127105979 is a deficient number, since it is larger than the sum of its proper divisors (1).

72127105979 is an equidigital number, since it uses as much as digits as its factorization.

72127105979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 555660, while the sum is 50.

The spelling of 72127105979 in words is "seventy-two billion, one hundred twenty-seven million, one hundred five thousand, nine hundred seventy-nine".