199459693 has 2 divisors, whose sum is σ = 199459694. Its totient is φ = 199459692.

The previous prime is 199459669. The next prime is 199459699. The reversal of 199459693 is 396954991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177902244 + 21557449 = 13338^2 + 4643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199459693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199459699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99729846 + 99729847.

It is an arithmetic number, because the mean of its divisors is an integer number (99729847).

Almost surely, 2^199459693 is an apocalyptic number.

It is an amenable number.

199459693 is a deficient number, since it is larger than the sum of its proper divisors (1).

199459693 is an equidigital number, since it uses as much as digits as its factorization.

199459693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2361960, while the sum is 55.

The square root of 199459693 is about 14123.0199674149. The cubic root of 199459693 is about 584.2764502825.

The spelling of 199459693 in words is "one hundred ninety-nine million, four hundred fifty-nine thousand, six hundred ninety-three".