136666199 has 2 divisors, whose sum is σ = 136666200. Its totient is φ = 136666198.

The previous prime is 136666193. The next prime is 136666217. The reversal of 136666199 is 991666631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136666199 - 2¹² = 136662103 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136666193) 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, 68333099 + 68333100.

It is an arithmetic number, because the mean of its divisors is an integer number (68333100).

Almost surely, 2^136666199 is an apocalyptic number.

136666199 is a deficient number, since it is larger than the sum of its proper divisors (1).

136666199 is an equidigital number, since it uses as much as digits as its factorization.

136666199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 47.

The square root of 136666199 is about 11690.4319424049. The cubic root of 136666199 is about 515.0946493961.

The spelling of 136666199 in words is "one hundred thirty-six million, six hundred sixty-six thousand, one hundred ninety-nine".