199150891 has 8 divisors (see below), whose sum is σ = 205406784. Its totient is φ = 192979200.

The previous prime is 199150883. The next prime is 199150907. The reversal of 199150891 is 198051991.

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

It is a cyclic number.

It is not a de Polignac number, because 199150891 - 2³ = 199150883 is a prime.

It is a super-2 number, since 2×199150891² = 79322154772187762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199150871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16230 + ... + 25723.

It is an arithmetic number, because the mean of its divisors is an integer number (25675848).

Almost surely, 2^199150891 is an apocalyptic number.

199150891 is a deficient number, since it is larger than the sum of its proper divisors (6255893).

199150891 is a wasteful number, since it uses less digits than its factorization.

199150891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42101.

The product of its (nonzero) digits is 29160, while the sum is 43.

The square root of 199150891 is about 14112.0831559341. The cubic root of 199150891 is about 583.9747704041.

The spelling of 199150891 in words is "one hundred ninety-nine million, one hundred fifty thousand, eight hundred ninety-one".