75303993 has 4 divisors (see below), whose sum is σ = 100405328. Its totient is φ = 50202660.

The previous prime is 75303979. The next prime is 75303997. The reversal of 75303993 is 39930357.

It is a happy number.

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 not a de Polignac number, because 75303993 - 2⁵ = 75303961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75303997) 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, 12550663 + ... + 12550668.

It is an arithmetic number, because the mean of its divisors is an integer number (25101332).

Almost surely, 2^75303993 is an apocalyptic number.

It is an amenable number.

75303993 is a deficient number, since it is larger than the sum of its proper divisors (25101335).

75303993 is a wasteful number, since it uses less digits than its factorization.

75303993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25101334.

The product of its (nonzero) digits is 76545, while the sum is 39.

The square root of 75303993 is about 8677.7873331858. The cubic root of 75303993 is about 422.2853370741.

The spelling of 75303993 in words is "seventy-five million, three hundred three thousand, nine hundred ninety-three".