73243909 has 4 divisors (see below), whose sum is σ = 73729120. Its totient is φ = 72758700.

The previous prime is 73243903. The next prime is 73243913. The reversal of 73243909 is 90934237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73243909 - 2³ = 73243901 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 (73243901) 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 3 ways as a sum of consecutive naturals, for example, 242379 + ... + 242680.

It is an arithmetic number, because the mean of its divisors is an integer number (18432280).

Almost surely, 2^73243909 is an apocalyptic number.

It is an amenable number.

73243909 is a deficient number, since it is larger than the sum of its proper divisors (485211).

73243909 is a wasteful number, since it uses less digits than its factorization.

73243909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485210.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 73243909 is about 8558.2655368947. The cubic root of 73243909 is about 418.3988717954.

The spelling of 73243909 in words is "seventy-three million, two hundred forty-three thousand, nine hundred nine".