133030906 has 16 divisors (see below), whose sum is σ = 206658144. Its totient is φ = 64182384.

The previous prime is 133030897. The next prime is 133030907. The reversal of 133030906 is 609030331.

It is not an unprimeable number, because it can be changed into a prime (133030907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2181 + ... + 16456.

It is an arithmetic number, because the mean of its divisors is an integer number (12916134).

Almost surely, 2^133030906 is an apocalyptic number.

133030906 is a deficient number, since it is larger than the sum of its proper divisors (73627238).

133030906 is a wasteful number, since it uses less digits than its factorization.

133030906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18765.

The product of its (nonzero) digits is 1458, while the sum is 25.

The square root of 133030906 is about 11533.9024618730. The cubic root of 133030906 is about 510.4864076618.

The spelling of 133030906 in words is "one hundred thirty-three million, thirty thousand, nine hundred six".