199034491 has 2 divisors, whose sum is σ = 199034492. Its totient is φ = 199034490.

The previous prime is 199034489. The next prime is 199034543. The reversal of 199034491 is 194430991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199034491 - 2¹ = 199034489 is a prime.

It is a super-2 number, since 2×199034491² = 79229457215258162, which contains 22 as substring.

Together with 199034489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (199034431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99517245 + 99517246.

It is an arithmetic number, because the mean of its divisors is an integer number (99517246).

Almost surely, 2^199034491 is an apocalyptic number.

199034491 is a deficient number, since it is larger than the sum of its proper divisors (1).

199034491 is an equidigital number, since it uses as much as digits as its factorization.

199034491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 199034491 is about 14107.9584277811. The cubic root of 199034491 is about 583.8609740919.

It can be divided in two parts, 1990 and 34491, that added together give a square (36481 = 191²).

The spelling of 199034491 in words is "one hundred ninety-nine million, thirty-four thousand, four hundred ninety-one".