199000978 has 16 divisors (see below), whose sum is σ = 326203200. Its totient is φ = 90298000.

The previous prime is 199000957. The next prime is 199000981. The reversal of 199000978 is 879000991.

199000978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5628 + ... + 20728.

It is an arithmetic number, because the mean of its divisors is an integer number (20387700).

Almost surely, 2^199000978 is an apocalyptic number.

199000978 is a deficient number, since it is larger than the sum of its proper divisors (127202222).

199000978 is a wasteful number, since it uses less digits than its factorization.

199000978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15713.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 199000978 is about 14106.7706439142. The cubic root of 199000978 is about 583.8282025003.

The spelling of 199000978 in words is "one hundred ninety-nine million, nine hundred seventy-eight", and thus it is an aban number.