75685543 has 4 divisors (see below), whose sum is σ = 75706488. Its totient is φ = 75664600.

The previous prime is 75685501. The next prime is 75685553. The reversal of 75685543 is 34558657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34558657 = 7 ⋅4936951.

It is a cyclic number.

It is not a de Polignac number, because 75685543 - 2¹³ = 75677351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75685543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75685553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3508 + ... + 12793.

It is an arithmetic number, because the mean of its divisors is an integer number (18926622).

Almost surely, 2^75685543 is an apocalyptic number.

75685543 is a deficient number, since it is larger than the sum of its proper divisors (20945).

75685543 is a wasteful number, since it uses less digits than its factorization.

75685543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20944.

The product of its digits is 504000, while the sum is 43.

The square root of 75685543 is about 8699.7438468038. The cubic root of 75685543 is about 422.9973471620.

The spelling of 75685543 in words is "seventy-five million, six hundred eighty-five thousand, five hundred forty-three".