73433821 has 4 divisors (see below), whose sum is σ = 73523872. Its totient is φ = 73343772.

The previous prime is 73433797. The next prime is 73433831. The reversal of 73433821 is 12833437.

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: 12833437 = 673 ⋅19069.

It is a cyclic number.

It is not a de Polignac number, because 73433821 - 2¹⁹ = 72909533 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 (73433831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43791 + ... + 45436.

It is an arithmetic number, because the mean of its divisors is an integer number (18380968).

Almost surely, 2^73433821 is an apocalyptic number.

It is an amenable number.

73433821 is a deficient number, since it is larger than the sum of its proper divisors (90051).

73433821 is an equidigital number, since it uses as much as digits as its factorization.

73433821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90050.

The product of its digits is 12096, while the sum is 31.

The square root of 73433821 is about 8569.3535928914. The cubic root of 73433821 is about 418.7601777878.

The spelling of 73433821 in words is "seventy-three million, four hundred thirty-three thousand, eight hundred twenty-one".