136691817 has 8 divisors (see below), whose sum is σ = 182349024. Its totient is φ = 91081248.

The previous prime is 136691791. The next prime is 136691831. The reversal of 136691817 is 718196631.

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

It is not a de Polignac number, because 136691817 - 2¹⁴ = 136675433 is a prime.

It is a super-2 number, since 2×136691817² = 37369305669522978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136691897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4123 + ... + 17040.

It is an arithmetic number, because the mean of its divisors is an integer number (22793628).

Almost surely, 2^136691817 is an apocalyptic number.

It is an amenable number.

136691817 is a deficient number, since it is larger than the sum of its proper divisors (45657207).

136691817 is a wasteful number, since it uses less digits than its factorization.

136691817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23319.

The product of its digits is 54432, while the sum is 42.

The square root of 136691817 is about 11691.5275734183. The cubic root of 136691817 is about 515.1268321167.

The spelling of 136691817 in words is "one hundred thirty-six million, six hundred ninety-one thousand, eight hundred seventeen".