133643886 has 8 divisors (see below), whose sum is σ = 267287784. Its totient is φ = 44547960.

The previous prime is 133643843. The next prime is 133643897. The reversal of 133643886 is 688346331.

133643886 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

133643886 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11136985 + ... + 11136996.

It is an arithmetic number, because the mean of its divisors is an integer number (33410973).

Almost surely, 2^133643886 is an apocalyptic number.

133643886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

133643886 is a wasteful number, since it uses less digits than its factorization.

133643886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22273986.

The product of its digits is 248832, while the sum is 42.

The square root of 133643886 is about 11560.4448876330. Note that the first 3 decimals coincide. The cubic root of 133643886 is about 511.2692797850.

The spelling of 133643886 in words is "one hundred thirty-three million, six hundred forty-three thousand, eight hundred eighty-six".