73989518 has 4 divisors (see below), whose sum is σ = 110984280. Its totient is φ = 36994758.

The previous prime is 73989497. The next prime is 73989521. The reversal of 73989518 is 81598937.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18497378 + ... + 18497381.

It is an arithmetic number, because the mean of its divisors is an integer number (27746070).

Almost surely, 2^73989518 is an apocalyptic number.

73989518 is a deficient number, since it is larger than the sum of its proper divisors (36994762).

73989518 is a wasteful number, since it uses less digits than its factorization.

73989518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36994761.

The product of its digits is 544320, while the sum is 50.

The square root of 73989518 is about 8601.7159915914. The cubic root of 73989518 is about 419.8138214886.

The spelling of 73989518 in words is "seventy-three million, nine hundred eighty-nine thousand, five hundred eighteen".