73609909 has 8 divisors (see below), whose sum is σ = 76559360. Its totient is φ = 70711056.

The previous prime is 73609897. The next prime is 73609931. The reversal of 73609909 is 90990637.

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 73609909 - 2²¹ = 71512757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73609999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9669 + ... + 15514.

It is an arithmetic number, because the mean of its divisors is an integer number (9569920).

Almost surely, 2^73609909 is an apocalyptic number.

73609909 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

73609909 is a deficient number, since it is larger than the sum of its proper divisors (2949451).

73609909 is a wasteful number, since it uses less digits than its factorization.

73609909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25299.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 73609909 is about 8579.6217282582. The cubic root of 73609909 is about 419.0946275910.

The spelling of 73609909 in words is "seventy-three million, six hundred nine thousand, nine hundred nine".