73085809 has 8 divisors (see below), whose sum is σ = 73847592. Its totient is φ = 72328320.

The previous prime is 73085791. The next prime is 73085827. The reversal of 73085809 is 90858037.

It is an interprime number because it is at equal distance from previous prime (73085791) and next prime (73085827).

It can be written as a sum of positive squares in 4 ways, for example, as 1311025 + 71774784 = 1145^2 + 8472^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73085809 - 2⁹ = 73085297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73083809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41307 + ... + 43039.

It is an arithmetic number, because the mean of its divisors is an integer number (9230949).

Almost surely, 2^73085809 is an apocalyptic number.

It is an amenable number.

73085809 is a deficient number, since it is larger than the sum of its proper divisors (761783).

73085809 is a wasteful number, since it uses less digits than its factorization.

73085809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 73085809 is about 8549.0238624067. The cubic root of 73085809 is about 418.0976111868.

The spelling of 73085809 in words is "seventy-three million, eighty-five thousand, eight hundred nine".