73548821 has 4 divisors (see below), whose sum is σ = 73566144. Its totient is φ = 73531500.

The previous prime is 73548803. The next prime is 73548823. The reversal of 73548821 is 12884537.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12884537 = 41 ⋅314257.

It is a cyclic number.

It is not a de Polignac number, because 73548821 - 2⁶ = 73548757 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 (73548823) 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, 2516 + ... + 12386.

It is an arithmetic number, because the mean of its divisors is an integer number (18391536).

Almost surely, 2^73548821 is an apocalyptic number.

It is an amenable number.

73548821 is a deficient number, since it is larger than the sum of its proper divisors (17323).

73548821 is an equidigital number, since it uses as much as digits as its factorization.

73548821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17322.

The product of its digits is 53760, while the sum is 38.

The square root of 73548821 is about 8576.0609256231. The cubic root of 73548821 is about 418.9786616004.

The spelling of 73548821 in words is "seventy-three million, five hundred forty-eight thousand, eight hundred twenty-one".