135687786 has 16 divisors (see below), whose sum is σ = 292250784. Its totient is φ = 41750064.

The previous prime is 135687763. The next prime is 135687809. The reversal of 135687786 is 687786531.

It is an interprime number because it is at equal distance from previous prime (135687763) and next prime (135687809).

It is a super-2 number, since 2×135687786² = 36822350539163592, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869716 + ... + 869871.

It is an arithmetic number, because the mean of its divisors is an integer number (18265674).

Almost surely, 2^135687786 is an apocalyptic number.

135687786 is an abundant number, since it is smaller than the sum of its proper divisors (156562998).

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

135687786 is a wasteful number, since it uses less digits than its factorization.

135687786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739605.

The product of its digits is 1693440, while the sum is 51.

The square root of 135687786 is about 11648.5100334764. The cubic root of 135687786 is about 513.8624920460.

The spelling of 135687786 in words is "one hundred thirty-five million, six hundred eighty-seven thousand, seven hundred eighty-six".