133986556 has 48 divisors (see below), whose sum is σ = 270668160. Its totient is φ = 57395520.

The previous prime is 133986551. The next prime is 133986599. The reversal of 133986556 is 655689331.

It is a super-2 number, since 2×133986556² = 35904794377482272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133986551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244675 + ... + 245221.

It is an arithmetic number, because the mean of its divisors is an integer number (5638920).

Almost surely, 2^133986556 is an apocalyptic number.

It is an amenable number.

133986556 is an abundant number, since it is smaller than the sum of its proper divisors (136681604).

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

133986556 is a wasteful number, since it uses less digits than its factorization.

133986556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 872 counting only the distinct ones).

The product of its digits is 583200, while the sum is 46.

The square root of 133986556 is about 11575.2561958688. The cubic root of 133986556 is about 511.7058806762.

It can be divided in two parts, 133 and 986556, that added together give a palindrome (986689).

The spelling of 133986556 in words is "one hundred thirty-three million, nine hundred eighty-six thousand, five hundred fifty-six".