73004909 has 4 divisors (see below), whose sum is σ = 73023804. Its totient is φ = 72986016.

The previous prime is 73004881. The next prime is 73004933. The reversal of 73004909 is 90940037.

It is a happy number.

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 25532809 + 47472100 = 5053^2 + 6890^2 .

It is a cyclic number.

It is not a de Polignac number, because 73004909 - 2²⁰ = 71956333 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 (73004209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322 + ... + 12155.

It is an arithmetic number, because the mean of its divisors is an integer number (18255951).

Almost surely, 2^73004909 is an apocalyptic number.

It is an amenable number.

73004909 is a deficient number, since it is larger than the sum of its proper divisors (18895).

73004909 is a wasteful number, since it uses less digits than its factorization.

73004909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18894.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 73004909 is about 8544.2910179839. The cubic root of 73004909 is about 417.9432876364.

The spelling of 73004909 in words is "seventy-three million, four thousand, nine hundred nine".