136685897 has 4 divisors (see below), whose sum is σ = 136771536. Its totient is φ = 136600260.

The previous prime is 136685893. The next prime is 136685911. The reversal of 136685897 is 798586631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136685897 - 2² = 136685893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136685893) 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 3 ways as a sum of consecutive naturals, for example, 40379 + ... + 43632.

It is an arithmetic number, because the mean of its divisors is an integer number (34192884).

Almost surely, 2^136685897 is an apocalyptic number.

It is an amenable number.

136685897 is a deficient number, since it is larger than the sum of its proper divisors (85639).

136685897 is an equidigital number, since it uses as much as digits as its factorization.

136685897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85638.

The product of its digits is 2177280, while the sum is 53.

The square root of 136685897 is about 11691.2743958903. The cubic root of 136685897 is about 515.1193954490.

The spelling of 136685897 in words is "one hundred thirty-six million, six hundred eighty-five thousand, eight hundred ninety-seven".