73489821 has 16 divisors (see below), whose sum is σ = 100243968. Its totient is φ = 47876400.

The previous prime is 73489789. The next prime is 73489859. The reversal of 73489821 is 12898437.

73489821 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 73489821 - 2⁵ = 73489789 is a prime.

It is a super-2 number, since 2×73489821² = 10801507581224082, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73489121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24936 + ... + 27726.

It is an arithmetic number, because the mean of its divisors is an integer number (6265248).

Almost surely, 2^73489821 is an apocalyptic number.

It is an amenable number.

73489821 is a deficient number, since it is larger than the sum of its proper divisors (26754147).

73489821 is a wasteful number, since it uses less digits than its factorization.

73489821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992.

The product of its digits is 96768, while the sum is 42.

The square root of 73489821 is about 8572.6204278505. The cubic root of 73489821 is about 418.8665983767.

The spelling of 73489821 in words is "seventy-three million, four hundred eighty-nine thousand, eight hundred twenty-one".