135816917 has 2 divisors, whose sum is σ = 135816918. Its totient is φ = 135816916.

The previous prime is 135816881. The next prime is 135816929. The reversal of 135816917 is 719618531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81558961 + 54257956 = 9031^2 + 7366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135816917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135816977) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67908458 + 67908459.

It is an arithmetic number, because the mean of its divisors is an integer number (67908459).

Almost surely, 2^135816917 is an apocalyptic number.

It is an amenable number.

135816917 is a deficient number, since it is larger than the sum of its proper divisors (1).

135816917 is an equidigital number, since it uses as much as digits as its factorization.

135816917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 41.

The square root of 135816917 is about 11654.0515272587. The cubic root of 135816917 is about 514.0254508031.

The spelling of 135816917 in words is "one hundred thirty-five million, eight hundred sixteen thousand, nine hundred seventeen".