135686990 has 16 divisors (see below), whose sum is σ = 245142720. Its totient is φ = 54073440.

The previous prime is 135686963. The next prime is 135687001. The reversal of 135686990 is 99686531.

It is a congruent number.

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, 22325 + ... + 27744.

It is an arithmetic number, because the mean of its divisors is an integer number (15321420).

Almost surely, 2^135686990 is an apocalyptic number.

135686990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135686990 is a deficient number, since it is larger than the sum of its proper divisors (109455730).

135686990 is a wasteful number, since it uses less digits than its factorization.

135686990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50347.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 135686990 is about 11648.4758659663. The cubic root of 135686990 is about 513.8614872016.

The spelling of 135686990 in words is "one hundred thirty-five million, six hundred eighty-six thousand, nine hundred ninety".