133906 has 16 divisors (see below), whose sum is σ = 217728. Its totient is φ = 61600.

The previous prime is 133877. The next prime is 133919. The reversal of 133906 is 609331.

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, 1851 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (13608).

2¹³³⁹⁰⁶ is an apocalyptic number.

133906 is a deficient number, since it is larger than the sum of its proper divisors (83822).

133906 is a wasteful number, since it uses less digits than its factorization.

133906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 133906 is about 365.9316876140. The cubic root of 133906 is about 51.1603310080.

The spelling of 133906 in words is "one hundred thirty-three thousand, nine hundred six".