133870239 has 10 divisors (see below), whose sum is σ = 199979120. Its totient is φ = 89246772.

The previous prime is 133870237. The next prime is 133870267. The reversal of 133870239 is 932078331.

It is a happy number.

It is not a de Polignac number, because 133870239 - 2¹ = 133870237 is a prime.

It is a super-3 number, since 3×133870239³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133870237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 826279 + ... + 826440.

It is an arithmetic number, because the mean of its divisors is an integer number (19997912).

Almost surely, 2^133870239 is an apocalyptic number.

133870239 is a deficient number, since it is larger than the sum of its proper divisors (66108881).

133870239 is an equidigital number, since it uses as much as digits as its factorization.

133870239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652731 (or 1652722 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 133870239 is about 11570.2307237151. The cubic root of 133870239 is about 511.5577630177.

The spelling of 133870239 in words is "one hundred thirty-three million, eight hundred seventy thousand, two hundred thirty-nine".