73243889 has 4 divisors (see below), whose sum is σ = 73313856. Its totient is φ = 73173924.

The previous prime is 73243867. The next prime is 73243897. The reversal of 73243889 is 98834237.

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.

It is a cyclic number.

It is not a de Polignac number, because 73243889 - 2²⁰ = 72195313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73243189) 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, 33389 + ... + 35514.

It is an arithmetic number, because the mean of its divisors is an integer number (18328464).

Almost surely, 2^73243889 is an apocalyptic number.

It is an amenable number.

73243889 is a deficient number, since it is larger than the sum of its proper divisors (69967).

73243889 is a wasteful number, since it uses less digits than its factorization.

73243889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69966.

The product of its digits is 290304, while the sum is 44.

The square root of 73243889 is about 8558.2643684336. The cubic root of 73243889 is about 418.3988337127.

The spelling of 73243889 in words is "seventy-three million, two hundred forty-three thousand, eight hundred eighty-nine".