199399176479 has 4 divisors (see below), whose sum is σ = 199400095200. Its totient is φ = 199398257760.

The previous prime is 199399176467. The next prime is 199399176497. The reversal of 199399176479 is 974671993991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 199399176479 - 2¹² = 199399172383 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 (199399176409) 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, 68039 + ... + 635159.

It is an arithmetic number, because the mean of its divisors is an integer number (49850023800).

Almost surely, 2^199399176479 is an apocalyptic number.

199399176479 is a deficient number, since it is larger than the sum of its proper divisors (918721).

199399176479 is an equidigital number, since it uses as much as digits as its factorization.

199399176479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918720.

The product of its digits is 208324872, while the sum is 74.

The spelling of 199399176479 in words is "one hundred ninety-nine billion, three hundred ninety-nine million, one hundred seventy-six thousand, four hundred seventy-nine".