75105609 has 12 divisors (see below), whose sum is σ = 106379184. Its totient is φ = 47124544.

The previous prime is 75105601. The next prime is 75105617. The reversal of 75105609 is 90650157.

It is an interprime number because it is at equal distance from previous prime (75105601) and next prime (75105617).

It is not a de Polignac number, because 75105609 - 2³ = 75105601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75105609.

It is not an unprimeable number, because it can be changed into a prime (75105601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42447 + ... + 44180.

It is an arithmetic number, because the mean of its divisors is an integer number (8864932).

Almost surely, 2^75105609 is an apocalyptic number.

It is an amenable number.

75105609 is a deficient number, since it is larger than the sum of its proper divisors (31273575).

75105609 is a wasteful number, since it uses less digits than its factorization.

75105609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86664 (or 86647 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 75105609 is about 8666.3492313661. The cubic root of 75105609 is about 421.9141822154.

The spelling of 75105609 in words is "seventy-five million, one hundred five thousand, six hundred nine".