135816817 has 8 divisors (see below), whose sum is σ = 141954624. Its totient is φ = 129698448.

The previous prime is 135816767. The next prime is 135816827. The reversal of 135816817 is 718618531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135816817 is a prime.

It is a super-2 number, since 2×135816817² = 36892415560022978, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135816817.

It is not an unprimeable number, because it can be changed into a prime (135816827) 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 in 7 ways as a sum of consecutive naturals, for example, 10498 + ... + 19540.

It is an arithmetic number, because the mean of its divisors is an integer number (17744328).

Almost surely, 2^135816817 is an apocalyptic number.

It is an amenable number.

135816817 is a deficient number, since it is larger than the sum of its proper divisors (6137807).

135816817 is an equidigital number, since it uses as much as digits as its factorization.

135816817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9719.

The product of its digits is 40320, while the sum is 40.

The square root of 135816817 is about 11654.0472369044. The cubic root of 135816817 is about 514.0253246467.

The spelling of 135816817 in words is "one hundred thirty-five million, eight hundred sixteen thousand, eight hundred seventeen".