136247643 has 16 divisors (see below), whose sum is σ = 230684160. Its totient is φ = 77855688.

The previous prime is 136247641. The next prime is 136247647. The reversal of 136247643 is 346742631.

It is a happy number.

136247643 is a `hidden beast` number, since 1 + 3 + 6 + 2 + 4 + 7 + 643 = 666.

It is not a de Polignac number, because 136247643 - 2¹ = 136247641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136247598 and 136247607.

It is not an unprimeable number, because it can be changed into a prime (136247641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360255 + ... + 360632.

It is an arithmetic number, because the mean of its divisors is an integer number (14417760).

Almost surely, 2^136247643 is an apocalyptic number.

136247643 is a deficient number, since it is larger than the sum of its proper divisors (94436517).

136247643 is an equidigital number, since it uses as much as digits as its factorization.

136247643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720903 (or 720897 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 136247643 is about 11672.5165667049. The cubic root of 136247643 is about 514.5682660652.

The spelling of 136247643 in words is "one hundred thirty-six million, two hundred forty-seven thousand, six hundred forty-three".