135736987 has 4 divisors (see below), whose sum is σ = 138625056. Its totient is φ = 132848920.

The previous prime is 135736981. The next prime is 135736999. The reversal of 135736987 is 789637531.

135736987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789637531 = 2081 ⋅379451.

It is a cyclic number.

It is not a de Polignac number, because 135736987 - 2²³ = 127348379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135736987.

It is not an unprimeable number, because it can be changed into a prime (135736981) 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, 1443964 + ... + 1444057.

It is an arithmetic number, because the mean of its divisors is an integer number (34656264).

Almost surely, 2^135736987 is an apocalyptic number.

135736987 is a deficient number, since it is larger than the sum of its proper divisors (2888069).

135736987 is an equidigital number, since it uses as much as digits as its factorization.

135736987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888068.

The product of its digits is 952560, while the sum is 49.

The square root of 135736987 is about 11650.6217430659. The cubic root of 135736987 is about 513.9245941555.

The spelling of 135736987 in words is "one hundred thirty-five million, seven hundred thirty-six thousand, nine hundred eighty-seven".