102072979889 has 2 divisors, whose sum is σ = 102072979890. Its totient is φ = 102072979888.

The previous prime is 102072979819. The next prime is 102072979903. The reversal of 102072979889 is 988979270201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98435925025 + 3637054864 = 313745^2 + 60308^2 .

It is a cyclic number.

It is not a de Polignac number, because 102072979889 - 2⁸ = 102072979633 is a prime.

It is not a weakly prime, because it can be changed into another prime (102072979819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51036489944 + 51036489945.

It is an arithmetic number, because the mean of its divisors is an integer number (51036489945).

Almost surely, 2^102072979889 is an apocalyptic number.

It is an amenable number.

102072979889 is a deficient number, since it is larger than the sum of its proper divisors (1).

102072979889 is an equidigital number, since it uses as much as digits as its factorization.

102072979889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 62.

The spelling of 102072979889 in words is "one hundred two billion, seventy-two million, nine hundred seventy-nine thousand, eight hundred eighty-nine".