73280573 has 4 divisors (see below), whose sum is σ = 73512060. Its totient is φ = 73049088.

The previous prime is 73280563. The next prime is 73280579. The reversal of 73280573 is 37508237.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37508237 = 13 ⋅2885249.

It can be written as a sum of positive squares in 2 ways, for example, as 4937284 + 68343289 = 2222^2 + 8267^2 .

It is a cyclic number.

It is not a de Polignac number, because 73280573 - 2⁶ = 73280509 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 (73280579) 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, 115268 + ... + 115901.

It is an arithmetic number, because the mean of its divisors is an integer number (18378015).

Almost surely, 2^73280573 is an apocalyptic number.

It is an amenable number.

73280573 is a deficient number, since it is larger than the sum of its proper divisors (231487).

73280573 is a wasteful number, since it uses less digits than its factorization.

73280573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231486.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 73280573 is about 8560.4072917122. The cubic root of 73280573 is about 418.4686733554.

The spelling of 73280573 in words is "seventy-three million, two hundred eighty thousand, five hundred seventy-three".