100209999979 has 2 divisors, whose sum is σ = 100209999980. Its totient is φ = 100209999978.

The previous prime is 100209999971. The next prime is 100210000019. The reversal of 100209999979 is 979999902001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100209999979 - 2³ = 100209999971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100209999979.

It is not a weakly prime, because it can be changed into another prime (100209999971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50104999989 + 50104999990.

It is an arithmetic number, because the mean of its divisors is an integer number (50104999990).

Almost surely, 2^100209999979 is an apocalyptic number.

100209999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

100209999979 is an equidigital number, since it uses as much as digits as its factorization.

100209999979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7440174, while the sum is 64.

The spelling of 100209999979 in words is "one hundred billion, two hundred nine million, nine hundred ninety-nine thousand, nine hundred seventy-nine".