83704321 has 4 divisors (see below), whose sum is σ = 85485312. Its totient is φ = 81923332.

The previous prime is 83704319. The next prime is 83704343. The reversal of 83704321 is 12340738.

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 83704321 - 2¹ = 83704319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83704321.

It is not an unprimeable number, because it can be changed into a prime (83704021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890425 + ... + 890518.

It is an arithmetic number, because the mean of its divisors is an integer number (21371328).

Almost surely, 2^83704321 is an apocalyptic number.

It is an amenable number.

83704321 is a deficient number, since it is larger than the sum of its proper divisors (1780991).

83704321 is a wasteful number, since it uses less digits than its factorization.

83704321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780990.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 83704321 is about 9149.0065580914. The cubic root of 83704321 is about 437.4374480366.

The spelling of 83704321 in words is "eighty-three million, seven hundred four thousand, three hundred twenty-one".