75306133 has 4 divisors (see below), whose sum is σ = 86064160. Its totient is φ = 64548108.

The previous prime is 75306113. The next prime is 75306157. The reversal of 75306133 is 33160357.

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: 33160357 = 977 ⋅33941.

It is a cyclic number.

It is not a de Polignac number, because 75306133 - 2²¹ = 73208981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75306103) 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, 5379003 + ... + 5379016.

It is an arithmetic number, because the mean of its divisors is an integer number (21516040).

Almost surely, 2^75306133 is an apocalyptic number.

It is an amenable number.

75306133 is a deficient number, since it is larger than the sum of its proper divisors (10758027).

75306133 is a wasteful number, since it uses less digits than its factorization.

75306133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10758026.

The product of its (nonzero) digits is 5670, while the sum is 28.

The square root of 75306133 is about 8677.9106356311. The cubic root of 75306133 is about 422.2893372253.

The spelling of 75306133 in words is "seventy-five million, three hundred six thousand, one hundred thirty-three".