199089964793 has 2 divisors, whose sum is σ = 199089964794. Its totient is φ = 199089964792.

The previous prime is 199089964763. The next prime is 199089964811. The reversal of 199089964793 is 397469980991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194297587264 + 4792377529 = 440792^2 + 69227^2 .

It is a cyclic number.

It is not a de Polignac number, because 199089964793 - 2⁸ = 199089964537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199089964793.

It is not a weakly prime, because it can be changed into another prime (199089964763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99544982396 + 99544982397.

It is an arithmetic number, because the mean of its divisors is an integer number (99544982397).

Almost surely, 2^199089964793 is an apocalyptic number.

It is an amenable number.

199089964793 is a deficient number, since it is larger than the sum of its proper divisors (1).

199089964793 is an equidigital number, since it uses as much as digits as its factorization.

199089964793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238085568, while the sum is 74.

The spelling of 199089964793 in words is "one hundred ninety-nine billion, eighty-nine million, nine hundred sixty-four thousand, seven hundred ninety-three".