199134431 has 4 divisors (see below), whose sum is σ = 201655200. Its totient is φ = 196613664.

The previous prime is 199134427. The next prime is 199134443. The reversal of 199134431 is 134431991.

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

It is a cyclic number.

It is not a de Polignac number, because 199134431 - 2² = 199134427 is a prime.

It is a super-2 number, since 2×199134431² = 79309043219387522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199134391 and 199134400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199134401) 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, 1260266 + ... + 1260423.

It is an arithmetic number, because the mean of its divisors is an integer number (50413800).

Almost surely, 2^199134431 is an apocalyptic number.

199134431 is a deficient number, since it is larger than the sum of its proper divisors (2520769).

199134431 is an equidigital number, since it uses as much as digits as its factorization.

199134431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520768.

The product of its digits is 11664, while the sum is 35.

The square root of 199134431 is about 14111.4999557099. The cubic root of 199134431 is about 583.9586812811.

The spelling of 199134431 in words is "one hundred ninety-nine million, one hundred thirty-four thousand, four hundred thirty-one".