73983209 has 6 divisors (see below), whose sum is σ = 75108474. Its totient is φ = 72874560.

The previous prime is 73983197. The next prime is 73983211. The reversal of 73983209 is 90238937.

It can be written as a sum of positive squares in only one way, i.e., 60403984 + 13579225 = 7772^2 + 3685^2 .

It is not a de Polignac number, because 73983209 - 2¹⁶ = 73917673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73983289) 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 5 ways as a sum of consecutive naturals, for example, 3752 + ... + 12729.

It is an arithmetic number, because the mean of its divisors is an integer number (12518079).

Almost surely, 2^73983209 is an apocalyptic number.

It is an amenable number.

73983209 is a deficient number, since it is larger than the sum of its proper divisors (1125265).

73983209 is an equidigital number, since it uses as much as digits as its factorization.

73983209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16615 (or 16548 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 73983209 is about 8601.3492546228. The cubic root of 73983209 is about 419.8018888043.

The spelling of 73983209 in words is "seventy-three million, nine hundred eighty-three thousand, two hundred nine".