75806009 has 4 divisors (see below), whose sum is σ = 80265204. Its totient is φ = 71346816.

The previous prime is 75805993. The next prime is 75806023. The reversal of 75806009 is 90060857.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40284409 + 35521600 = 6347^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 75806009 - 2⁴ = 75805993 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 75806009.

It is not an unprimeable number, because it can be changed into a prime (75806069) 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, 2229572 + ... + 2229605.

It is an arithmetic number, because the mean of its divisors is an integer number (20066301).

Almost surely, 2^75806009 is an apocalyptic number.

It is an amenable number.

75806009 is a deficient number, since it is larger than the sum of its proper divisors (4459195).

75806009 is a wasteful number, since it uses less digits than its factorization.

75806009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4459194.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 75806009 is about 8706.6646311891. The cubic root of 75806009 is about 423.2216515003.

The spelling of 75806009 in words is "seventy-five million, eight hundred six thousand, nine".