199890611 has 4 divisors (see below), whose sum is σ = 200301552. Its totient is φ = 199479672.

The previous prime is 199890599. The next prime is 199890623. The reversal of 199890611 is 116098991.

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

It is an interprime number because it is at equal distance from previous prime (199890599) and next prime (199890623).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199890611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199190611) 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, 204740 + ... + 205713.

It is an arithmetic number, because the mean of its divisors is an integer number (50075388).

Almost surely, 2^199890611 is an apocalyptic number.

199890611 is a deficient number, since it is larger than the sum of its proper divisors (410941).

199890611 is an equidigital number, since it uses as much as digits as its factorization.

199890611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410940.

The product of its (nonzero) digits is 34992, while the sum is 44.

The square root of 199890611 is about 14138.2676095765. The cubic root of 199890611 is about 584.6969097397.

The spelling of 199890611 in words is "one hundred ninety-nine million, eight hundred ninety thousand, six hundred eleven".