101199979 has 2 divisors, whose sum is σ = 101199980. Its totient is φ = 101199978.

The previous prime is 101199961. The next prime is 101200007. The reversal of 101199979 is 979991101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101199979 - 2⁹ = 101199467 is a prime.

It is not a weakly prime, because it can be changed into another prime (101199919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50599989 + 50599990.

It is an arithmetic number, because the mean of its divisors is an integer number (50599990).

Almost surely, 2^101199979 is an apocalyptic number.

101199979 is a deficient number, since it is larger than the sum of its proper divisors (1).

101199979 is an equidigital number, since it uses as much as digits as its factorization.

101199979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 46.

The square root of 101199979 is about 10059.8200282112. The cubic root of 101199979 is about 466.0081092365.

The spelling of 101199979 in words is "one hundred one million, one hundred ninety-nine thousand, nine hundred seventy-nine".