133011993 has 8 divisors (see below), whose sum is σ = 178411968. Its totient is φ = 88143344.

The previous prime is 133011947. The next prime is 133012001. The reversal of 133011993 is 399110331.

It is a happy number.

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 133011993 - 2⁹ = 133011481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133011993.

It is not an unprimeable number, because it can be changed into a prime (133011493) 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, 132246 + ... + 133247.

It is an arithmetic number, because the mean of its divisors is an integer number (22301496).

Almost surely, 2^133011993 is an apocalyptic number.

It is an amenable number.

133011993 is a deficient number, since it is larger than the sum of its proper divisors (45399975).

133011993 is a wasteful number, since it uses less digits than its factorization.

133011993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265663.

The product of its (nonzero) digits is 2187, while the sum is 30.

The square root of 133011993 is about 11533.0825454429. The cubic root of 133011993 is about 510.4622145694.

The spelling of 133011993 in words is "one hundred thirty-three million, eleven thousand, nine hundred ninety-three".