100011979 has 2 divisors, whose sum is σ = 100011980. Its totient is φ = 100011978.

The previous prime is 100011973. The next prime is 100012019. The reversal of 100011979 is 979110001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100011979 - 2⁹ = 100011467 is a prime.

It is not a weakly prime, because it can be changed into another prime (100011973) 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, 50005989 + 50005990.

It is an arithmetic number, because the mean of its divisors is an integer number (50005990).

Almost surely, 2^100011979 is an apocalyptic number.

100011979 is a deficient number, since it is larger than the sum of its proper divisors (1).

100011979 is an equidigital number, since it uses as much as digits as its factorization.

100011979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 100011979 is about 10000.5989320640. The cubic root of 100011979 is about 464.1774164855.

The spelling of 100011979 in words is "one hundred million, eleven thousand, nine hundred seventy-nine".