101998679 has 2 divisors, whose sum is σ = 101998680. Its totient is φ = 101998678.

The previous prime is 101998667. The next prime is 101998697. The reversal of 101998679 is 976899101.

Together with next prime (101998697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101998679 - 2²⁰ = 100950103 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101998609) 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, 50999339 + 50999340.

It is an arithmetic number, because the mean of its divisors is an integer number (50999340).

Almost surely, 2^101998679 is an apocalyptic number.

101998679 is a deficient number, since it is larger than the sum of its proper divisors (1).

101998679 is an equidigital number, since it uses as much as digits as its factorization.

101998679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 50.

The square root of 101998679 is about 10099.4395389051. The cubic root of 101998679 is about 467.2308557856.

The spelling of 101998679 in words is "one hundred one million, nine hundred ninety-eight thousand, six hundred seventy-nine".