135186987 has 12 divisors (see below), whose sum is σ = 195181944. Its totient is φ = 83191680.

The previous prime is 135186983. The next prime is 135186991. The reversal of 135186987 is 789681531.

It is an interprime number because it is at equal distance from previous prime (135186983) and next prime (135186991).

It is not a de Polignac number, because 135186987 - 2² = 135186983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135186983) 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, 132814 + ... + 133827.

It is an arithmetic number, because the mean of its divisors is an integer number (16265162).

Almost surely, 2^135186987 is an apocalyptic number.

135186987 is a deficient number, since it is larger than the sum of its proper divisors (59994957).

135186987 is a wasteful number, since it uses less digits than its factorization.

135186987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266670 (or 266657 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

The square root of 135186987 is about 11626.9938935221. The cubic root of 135186987 is about 513.2295216042.

The spelling of 135186987 in words is "one hundred thirty-five million, one hundred eighty-six thousand, nine hundred eighty-seven".