136007993 has 12 divisors (see below), whose sum is σ = 155999424. Its totient is φ = 118265400.

The previous prime is 136007987. The next prime is 136008013. The reversal of 136007993 is 399700631.

It is a de Polignac number, because none of the positive numbers 2^k-136007993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136007953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21653 + ... + 27218.

It is an arithmetic number, because the mean of its divisors is an integer number (12999952).

Almost surely, 2^136007993 is an apocalyptic number.

It is an amenable number.

136007993 is a deficient number, since it is larger than the sum of its proper divisors (19991431).

136007993 is a wasteful number, since it uses less digits than its factorization.

136007993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48916 (or 48905 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 136007993 is about 11662.2464817033. The cubic root of 136007993 is about 514.2663925685.

It can be divided in two parts, 13 and 6007993, that added together give a palindrome (6008006).

The spelling of 136007993 in words is "one hundred thirty-six million, seven thousand, nine hundred ninety-three".