999879000194 has 8 divisors (see below), whose sum is σ = 1540354135548. Its totient is φ = 486427621680.

The previous prime is 999879000187. The next prime is 999879000199. The reversal of 999879000194 is 491000978999.

It can be written as a sum of positive squares in 2 ways, for example, as 806696774569 + 193182225625 = 898163^2 + 439525^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 999879000194.

It is not an unprimeable number, because it can be changed into a prime (999879000199) 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, 6755939117 + ... + 6755939264.

Almost surely, 2^999879000194 is an apocalyptic number.

999879000194 is a deficient number, since it is larger than the sum of its proper divisors (540475135354).

999879000194 is a wasteful number, since it uses less digits than its factorization.

999879000194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13511878420.

The product of its (nonzero) digits is 13226976, while the sum is 65.

The spelling of 999879000194 in words is "nine hundred ninety-nine billion, eight hundred seventy-nine million, one hundred ninety-four", and thus it is an aban number.