199412831291 has 2 divisors, whose sum is σ = 199412831292. Its totient is φ = 199412831290.

The previous prime is 199412831281. The next prime is 199412831309. The reversal of 199412831291 is 192138214991.

It is a weak prime.

It is an emirp because it is prime and its reverse (192138214991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199412831291 - 2¹⁴ = 199412814907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (199412831221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99706415645 + 99706415646.

It is an arithmetic number, because the mean of its divisors is an integer number (99706415646).

Almost surely, 2^199412831291 is an apocalyptic number.

199412831291 is a deficient number, since it is larger than the sum of its proper divisors (1).

199412831291 is an equidigital number, since it uses as much as digits as its factorization.

199412831291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 50.

The spelling of 199412831291 in words is "one hundred ninety-nine billion, four hundred twelve million, eight hundred thirty-one thousand, two hundred ninety-one".