135687990 has 16 divisors (see below), whose sum is σ = 325651248. Its totient is φ = 36183456.

The previous prime is 135687989. The next prime is 135687997. The reversal of 135687990 is 99786531.

135687990 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×135687990² = 36822461260480200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135687997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2261437 + ... + 2261496.

It is an arithmetic number, because the mean of its divisors is an integer number (20353203).

Almost surely, 2^135687990 is an apocalyptic number.

135687990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135687990 is an abundant number, since it is smaller than the sum of its proper divisors (189963258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135687990 is a wasteful number, since it uses less digits than its factorization.

135687990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522943.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 135687990 is about 11648.5187899578. The cubic root of 135687990 is about 513.8627495684.

The spelling of 135687990 in words is "one hundred thirty-five million, six hundred eighty-seven thousand, nine hundred ninety".