136663819 has 2 divisors, whose sum is σ = 136663820. Its totient is φ = 136663818.

The previous prime is 136663781. The next prime is 136663823. The reversal of 136663819 is 918366631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136663819 - 2⁷ = 136663691 is a prime.

It is a super-2 number, since 2×136663819² = 37353998847329522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136663859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68331909 + 68331910.

It is an arithmetic number, because the mean of its divisors is an integer number (68331910).

Almost surely, 2^136663819 is an apocalyptic number.

136663819 is a deficient number, since it is larger than the sum of its proper divisors (1).

136663819 is an equidigital number, since it uses as much as digits as its factorization.

136663819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 136663819 is about 11690.3301493157. The cubic root of 136663819 is about 515.0916593069.

The spelling of 136663819 in words is "one hundred thirty-six million, six hundred sixty-three thousand, eight hundred nineteen".