133999986 has 16 divisors (see below), whose sum is σ = 270111744. Its totient is φ = 44314704.

The previous prime is 133999979. The next prime is 134000003. The reversal of 133999986 is 689999331.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87165 + ... + 88688.

It is an arithmetic number, because the mean of its divisors is an integer number (16881984).

Almost surely, 2^133999986 is an apocalyptic number.

133999986 is an abundant number, since it is smaller than the sum of its proper divisors (136111758).

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

133999986 is a wasteful number, since it uses less digits than its factorization.

133999986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175985.

The product of its digits is 2834352, while the sum is 57.

The square root of 133999986 is about 11575.8362980823. The cubic root of 133999986 is about 511.7229768700.

The spelling of 133999986 in words is "one hundred thirty-three million, nine hundred ninety-nine thousand, nine hundred eighty-six".