133985233 has 4 divisors (see below), whose sum is σ = 134015728. Its totient is φ = 133954740.

The previous prime is 133985231. The next prime is 133985239. The reversal of 133985233 is 332589331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332589331 = 139 ⋅2392729.

It is a cyclic number.

It is not a de Polignac number, because 133985233 - 2¹ = 133985231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133985192 and 133985201.

It is not an unprimeable number, because it can be changed into a prime (133985231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7263 + ... + 17908.

It is an arithmetic number, because the mean of its divisors is an integer number (33503932).

Almost surely, 2^133985233 is an apocalyptic number.

It is an amenable number.

133985233 is a deficient number, since it is larger than the sum of its proper divisors (30495).

133985233 is an equidigital number, since it uses as much as digits as its factorization.

133985233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30494.

The product of its digits is 58320, while the sum is 37.

The square root of 133985233 is about 11575.1990479646. The cubic root of 133985233 is about 511.7041964547.

The spelling of 133985233 in words is "one hundred thirty-three million, nine hundred eighty-five thousand, two hundred thirty-three".