133375187 has 8 divisors (see below), whose sum is σ = 145704960. Its totient is φ = 121079560.

The previous prime is 133375181. The next prime is 133375201. The reversal of 133375187 is 781573331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133375187 - 2⁴ = 133375171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133375187.

It is not an unprimeable number, because it can be changed into a prime (133375181) 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, 14 + ... + 16332.

It is an arithmetic number, because the mean of its divisors is an integer number (18213120).

Almost surely, 2^133375187 is an apocalyptic number.

133375187 is a deficient number, since it is larger than the sum of its proper divisors (12329773).

133375187 is a wasteful number, since it uses less digits than its factorization.

133375187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17073.

The product of its digits is 52920, while the sum is 38.

The square root of 133375187 is about 11548.8175585209. The cubic root of 133375187 is about 510.9264041027.

The spelling of 133375187 in words is "one hundred thirty-three million, three hundred seventy-five thousand, one hundred eighty-seven".