199520291 has 2 divisors, whose sum is σ = 199520292. Its totient is φ = 199520290.

The previous prime is 199520281. The next prime is 199520303. The reversal of 199520291 is 192025991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199520291 is a prime.

It is not a weakly prime, because it can be changed into another prime (199520201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99760145 + 99760146.

It is an arithmetic number, because the mean of its divisors is an integer number (99760146).

Almost surely, 2^199520291 is an apocalyptic number.

199520291 is a deficient number, since it is larger than the sum of its proper divisors (1).

199520291 is an equidigital number, since it uses as much as digits as its factorization.

199520291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 199520291 is about 14125.1651671759. The cubic root of 199520291 is about 584.3356141147.

The spelling of 199520291 in words is "one hundred ninety-nine million, five hundred twenty thousand, two hundred ninety-one".