133705993 has 4 divisors (see below), whose sum is σ = 135589248. Its totient is φ = 131822740.

The previous prime is 133705987. The next prime is 133706009. The reversal of 133705993 is 399507331.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133705993 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133705933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941521 + ... + 941662.

It is an arithmetic number, because the mean of its divisors is an integer number (33897312).

Almost surely, 2^133705993 is an apocalyptic number.

It is an amenable number.

133705993 is a deficient number, since it is larger than the sum of its proper divisors (1883255).

133705993 is an equidigital number, since it uses as much as digits as its factorization.

133705993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883254.

The product of its (nonzero) digits is 76545, while the sum is 40.

The square root of 133705993 is about 11563.1307611736. The cubic root of 133705993 is about 511.3484665565.

The spelling of 133705993 in words is "one hundred thirty-three million, seven hundred five thousand, nine hundred ninety-three".