199056009 has 16 divisors (see below), whose sum is σ = 282132288. Its totient is φ = 124403712.

The previous prime is 199055981. The next prime is 199056019. The reversal of 199056009 is 900650991.

It is not a de Polignac number, because 199056009 - 2⁵ = 199055977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199056019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5514 + ... + 20700.

It is an arithmetic number, because the mean of its divisors is an integer number (17633268).

Almost surely, 2^199056009 is an apocalyptic number.

It is an amenable number.

199056009 is a deficient number, since it is larger than the sum of its proper divisors (83076279).

199056009 is a wasteful number, since it uses less digits than its factorization.

199056009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15464.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 199056009 is about 14108.7210263723. The cubic root of 199056009 is about 583.8820141097.

The spelling of 199056009 in words is "one hundred ninety-nine million, fifty-six thousand, nine".