75052809 has 24 divisors (see below), whose sum is σ = 117691392. Its totient is φ = 45813600.

The previous prime is 75052801. The next prime is 75052819. The reversal of 75052809 is 90825057.

It is not a de Polignac number, because 75052809 - 2³ = 75052801 is a prime.

It is a super-3 number, since 3×75052809³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75052801) 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 23 ways as a sum of consecutive naturals, for example, 12334 + ... + 17384.

It is an arithmetic number, because the mean of its divisors is an integer number (4903808).

Almost surely, 2^75052809 is an apocalyptic number.

It is an amenable number.

75052809 is a deficient number, since it is larger than the sum of its proper divisors (42638583).

75052809 is a wasteful number, since it uses less digits than its factorization.

75052809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197 (or 5194 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 75052809 is about 8663.3024303668. The cubic root of 75052809 is about 421.8152890635.

The spelling of 75052809 in words is "seventy-five million, fifty-two thousand, eight hundred nine".