73229809 has 4 divisors (see below), whose sum is σ = 73247220. Its totient is φ = 73212400.

The previous prime is 73229789. The next prime is 73229831. The reversal of 73229809 is 90892237.

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 43560000 + 29669809 = 6600^2 + 5447^2 .

It is a cyclic number.

It is not a de Polignac number, because 73229809 - 2⁹ = 73229297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73229899) 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, 1959 + ... + 12259.

It is an arithmetic number, because the mean of its divisors is an integer number (18311805).

Almost surely, 2^73229809 is an apocalyptic number.

It is an amenable number.

73229809 is a deficient number, since it is larger than the sum of its proper divisors (17411).

73229809 is a wasteful number, since it uses less digits than its factorization.

73229809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17410.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 73229809 is about 8557.4417322001. The cubic root of 73229809 is about 418.3720217689.

The spelling of 73229809 in words is "seventy-three million, two hundred twenty-nine thousand, eight hundred nine".