101998879 has 4 divisors (see below), whose sum is σ = 102367384. Its totient is φ = 101630376.

The previous prime is 101998873. The next prime is 101998889. The reversal of 101998879 is 978899101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978899101 = 1873 ⋅522637.

It is a cyclic number.

It is not a de Polignac number, because 101998879 - 2⁵ = 101998847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101998873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183837 + ... + 184390.

It is an arithmetic number, because the mean of its divisors is an integer number (25591846).

Almost surely, 2^101998879 is an apocalyptic number.

101998879 is a deficient number, since it is larger than the sum of its proper divisors (368505).

101998879 is an equidigital number, since it uses as much as digits as its factorization.

101998879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368504.

The product of its (nonzero) digits is 326592, while the sum is 52.

The square root of 101998879 is about 10099.4494404398. The cubic root of 101998879 is about 467.2311611690.

The spelling of 101998879 in words is "one hundred one million, nine hundred ninety-eight thousand, eight hundred seventy-nine".