10891198979 has 2 divisors, whose sum is σ = 10891198980. Its totient is φ = 10891198978.

The previous prime is 10891198963. The next prime is 10891198991. The reversal of 10891198979 is 97989119801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10891198979 - 2⁴ = 10891198963 is a prime.

It is not a weakly prime, because it can be changed into another prime (10891198079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5445599489 + 5445599490.

It is an arithmetic number, because the mean of its divisors is an integer number (5445599490).

Almost surely, 2^10891198979 is an apocalyptic number.

10891198979 is a deficient number, since it is larger than the sum of its proper divisors (1).

10891198979 is an equidigital number, since it uses as much as digits as its factorization.

10891198979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 62.

The spelling of 10891198979 in words is "ten billion, eight hundred ninety-one million, one hundred ninety-eight thousand, nine hundred seventy-nine".