199000979 has 4 divisors (see below), whose sum is σ = 199543584. Its totient is φ = 198458376.

The previous prime is 199000957. The next prime is 199000981. The reversal of 199000979 is 979000991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199000979 - 2²⁴ = 182223763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199000579) 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, 270752 + ... + 271485.

It is an arithmetic number, because the mean of its divisors is an integer number (49885896).

Almost surely, 2^199000979 is an apocalyptic number.

199000979 is a deficient number, since it is larger than the sum of its proper divisors (542605).

199000979 is an equidigital number, since it uses as much as digits as its factorization.

199000979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542604.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 199000979 is about 14106.7706793582. The cubic root of 199000979 is about 583.8282034783.

The spelling of 199000979 in words is "one hundred ninety-nine million, nine hundred seventy-nine", and thus it is an aban number.