73032209 has 4 divisors (see below), whose sum is σ = 73090416. Its totient is φ = 72974004.

The previous prime is 73032203. The next prime is 73032229. The reversal of 73032209 is 90223037.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90223037 = 71 ⋅1270747.

It is a cyclic number.

It is not a de Polignac number, because 73032209 - 2²⁰ = 71983633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73032203) 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, 27179 + ... + 29744.

It is an arithmetic number, because the mean of its divisors is an integer number (18272604).

Almost surely, 2^73032209 is an apocalyptic number.

It is an amenable number.

73032209 is a deficient number, since it is larger than the sum of its proper divisors (58207).

73032209 is a wasteful number, since it uses less digits than its factorization.

73032209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58206.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 73032209 is about 8545.8884266061. Note that the first 3 decimals coincide. The cubic root of 73032209 is about 417.9953774204.

The spelling of 73032209 in words is "seventy-three million, thirty-two thousand, two hundred nine".