135687719 has 2 divisors, whose sum is σ = 135687720. Its totient is φ = 135687718.

The previous prime is 135687707. The next prime is 135687733. The reversal of 135687719 is 917786531.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135687719 is a prime.

It is a super-2 number, since 2×135687719² = 36822314174845922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135617719) 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, 67843859 + 67843860.

It is an arithmetic number, because the mean of its divisors is an integer number (67843860).

Almost surely, 2^135687719 is an apocalyptic number.

135687719 is a deficient number, since it is larger than the sum of its proper divisors (1).

135687719 is an equidigital number, since it uses as much as digits as its factorization.

135687719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 47.

The square root of 135687719 is about 11648.5071575717. The cubic root of 135687719 is about 513.8624074676.

The spelling of 135687719 in words is "one hundred thirty-five million, six hundred eighty-seven thousand, seven hundred nineteen".