199932986879 has 4 divisors (see below), whose sum is σ = 199939771200. Its totient is φ = 199926202560.

The previous prime is 199932986867. The next prime is 199932986893. The reversal of 199932986879 is 978689239991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978689239991 = 569 ⋅1720016239.

It is a cyclic number.

It is not a de Polignac number, because 199932986879 - 2⁴ = 199932986863 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 (199932986479) 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, 3347762 + ... + 3406959.

It is an arithmetic number, because the mean of its divisors is an integer number (49984942800).

Almost surely, 2^199932986879 is an apocalyptic number.

199932986879 is a deficient number, since it is larger than the sum of its proper divisors (6784321).

199932986879 is an equidigital number, since it uses as much as digits as its factorization.

199932986879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6784320.

The product of its digits is 952342272, while the sum is 80.

It can be divided in two parts, 199932 and 986879, that added together give a palindrome (1186811).

The spelling of 199932986879 in words is "one hundred ninety-nine billion, nine hundred thirty-two million, nine hundred eighty-six thousand, eight hundred seventy-nine".