136565986 has 8 divisors (see below), whose sum is σ = 205589340. Its totient is φ = 68036208.

The previous prime is 136565983. The next prime is 136565987. The reversal of 136565986 is 689565631.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 114896961 + 21669025 = 10719^2 + 4655^2 .

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

It is not an unprimeable number, because it can be changed into a prime (136565983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122701 + ... + 123808.

Almost surely, 2^136565986 is an apocalyptic number.

136565986 is a deficient number, since it is larger than the sum of its proper divisors (69023354).

136565986 is a wasteful number, since it uses less digits than its factorization.

136565986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246788.

The product of its digits is 1166400, while the sum is 49.

The square root of 136565986 is about 11686.1450444533. The cubic root of 136565986 is about 514.9687177404.

The spelling of 136565986 in words is "one hundred thirty-six million, five hundred sixty-five thousand, nine hundred eighty-six".