136287917 has 2 divisors, whose sum is σ = 136287918. Its totient is φ = 136287916.

The previous prime is 136287913. The next prime is 136287947. The reversal of 136287917 is 719782631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127825636 + 8462281 = 11306^2 + 2909^2 .

It is a cyclic number.

It is not a de Polignac number, because 136287917 - 2² = 136287913 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136287913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68143958 + 68143959.

It is an arithmetic number, because the mean of its divisors is an integer number (68143959).

Almost surely, 2^136287917 is an apocalyptic number.

It is an amenable number.

136287917 is a deficient number, since it is larger than the sum of its proper divisors (1).

136287917 is an equidigital number, since it uses as much as digits as its factorization.

136287917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 136287917 is about 11674.2416027766. The cubic root of 136287917 is about 514.6189621856.

The spelling of 136287917 in words is "one hundred thirty-six million, two hundred eighty-seven thousand, nine hundred seventeen".