75423509 has 24 divisors (see below), whose sum is σ = 95607168. Its totient is φ = 58164480.

The previous prime is 75423503. The next prime is 75423533. The reversal of 75423509 is 90532457.

It is not a de Polignac number, because 75423509 - 2⁸ = 75423253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75423503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45719 + ... + 47339.

It is an arithmetic number, because the mean of its divisors is an integer number (3983632).

Almost surely, 2^75423509 is an apocalyptic number.

It is an amenable number.

75423509 is a deficient number, since it is larger than the sum of its proper divisors (20183659).

75423509 is a wasteful number, since it uses less digits than its factorization.

75423509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1668 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 75423509 is about 8684.6709206509. The cubic root of 75423509 is about 422.5086239384.

The spelling of 75423509 in words is "seventy-five million, four hundred twenty-three thousand, five hundred nine".