133858209 has 16 divisors (see below), whose sum is σ = 182771712. Its totient is φ = 87102288.

The previous prime is 133858201. The next prime is 133858237. The reversal of 133858209 is 902858331.

It is not a de Polignac number, because 133858209 - 2³ = 133858201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133858201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61392 + ... + 63534.

It is an arithmetic number, because the mean of its divisors is an integer number (11423232).

Almost surely, 2^133858209 is an apocalyptic number.

It is an amenable number.

133858209 is a deficient number, since it is larger than the sum of its proper divisors (48913503).

133858209 is a wasteful number, since it uses less digits than its factorization.

133858209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 133858209 is about 11569.7108434049. The cubic root of 133858209 is about 511.5424391631.

The spelling of 133858209 in words is "one hundred thirty-three million, eight hundred fifty-eight thousand, two hundred nine".