73057209 has 4 divisors (see below), whose sum is σ = 97409616. Its totient is φ = 48704804.

The previous prime is 73057207. The next prime is 73057241. The reversal of 73057209 is 90275037.

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: 90275037 = 3 ⋅30091679.

It is a cyclic number.

It is not a de Polignac number, because 73057209 - 2¹ = 73057207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73057209.

It is not an unprimeable number, because it can be changed into a prime (73057207) 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, 12176199 + ... + 12176204.

It is an arithmetic number, because the mean of its divisors is an integer number (24352404).

Almost surely, 2^73057209 is an apocalyptic number.

It is an amenable number.

73057209 is a deficient number, since it is larger than the sum of its proper divisors (24352407).

73057209 is a wasteful number, since it uses less digits than its factorization.

73057209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24352406.

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 73057209 is about 8547.3509931440. The cubic root of 73057209 is about 418.0430673024.

The spelling of 73057209 in words is "seventy-three million, fifty-seven thousand, two hundred nine".