135717899 has 2 divisors, whose sum is σ = 135717900. Its totient is φ = 135717898.

The previous prime is 135717839. The next prime is 135717937. The reversal of 135717899 is 998717531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135717899 - 2¹² = 135713803 is a prime.

It is not a weakly prime, because it can be changed into another prime (135717809) 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, 67858949 + 67858950.

It is an arithmetic number, because the mean of its divisors is an integer number (67858950).

Almost surely, 2^135717899 is an apocalyptic number.

135717899 is a deficient number, since it is larger than the sum of its proper divisors (1).

135717899 is an equidigital number, since it uses as much as digits as its factorization.

135717899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 50.

The square root of 135717899 is about 11649.8025305153. The cubic root of 135717899 is about 513.9005028283.

The spelling of 135717899 in words is "one hundred thirty-five million, seven hundred seventeen thousand, eight hundred ninety-nine".