199126961 has 4 divisors (see below), whose sum is σ = 217229424. Its totient is φ = 181024500.

The previous prime is 199126951. The next prime is 199126987. The reversal of 199126961 is 169621991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 199126961 - 2¹⁰ = 199125937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199126951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9051215 + ... + 9051236.

It is an arithmetic number, because the mean of its divisors is an integer number (54307356).

Almost surely, 2^199126961 is an apocalyptic number.

199126961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

199126961 is a deficient number, since it is larger than the sum of its proper divisors (18102463).

199126961 is a wasteful number, since it uses less digits than its factorization.

199126961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18102462.

The product of its digits is 52488, while the sum is 44.

The square root of 199126961 is about 14111.2352754817. The cubic root of 199126961 is about 583.9513793027.

The spelling of 199126961 in words is "one hundred ninety-nine million, one hundred twenty-six thousand, nine hundred sixty-one".