73963821 has 8 divisors (see below), whose sum is σ = 104419584. Its totient is φ = 46408640.

The previous prime is 73963807. The next prime is 73963831. The reversal of 73963821 is 12836937.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73963821 - 2¹⁴ = 73947437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73963821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73963801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725085 + ... + 725186.

It is an arithmetic number, because the mean of its divisors is an integer number (13052448).

Almost surely, 2^73963821 is an apocalyptic number.

It is an amenable number.

73963821 is a deficient number, since it is larger than the sum of its proper divisors (30455763).

73963821 is a wasteful number, since it uses less digits than its factorization.

73963821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450291.

The product of its digits is 54432, while the sum is 39.

The square root of 73963821 is about 8600.2221482936. Note that the first 3 decimals coincide. The cubic root of 73963821 is about 419.7652145814.

The spelling of 73963821 in words is "seventy-three million, nine hundred sixty-three thousand, eight hundred twenty-one".