73099909 has 4 divisors (see below), whose sum is σ = 73122304. Its totient is φ = 73077516.

The previous prime is 73099903. The next prime is 73099921. The reversal of 73099909 is 90999037.

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 73099909 - 2¹⁷ = 72968837 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 (73099903) 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, 5247 + ... + 13180.

It is an arithmetic number, because the mean of its divisors is an integer number (18280576).

Almost surely, 2^73099909 is an apocalyptic number.

It is an amenable number.

73099909 is a deficient number, since it is larger than the sum of its proper divisors (22395).

73099909 is a wasteful number, since it uses less digits than its factorization.

73099909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22394.

The product of its (nonzero) digits is 137781, while the sum is 46.

The square root of 73099909 is about 8549.8484781895. The cubic root of 73099909 is about 418.1244964665.

The spelling of 73099909 in words is "seventy-three million, ninety-nine thousand, nine hundred nine".