84122321 has 4 divisors (see below), whose sum is σ = 84562944. Its totient is φ = 83681700.

The previous prime is 84122299. The next prime is 84122323. The reversal of 84122321 is 12322148.

It is a happy number.

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 84122321 - 2⁶ = 84122257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84122323) 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, 220025 + ... + 220406.

It is an arithmetic number, because the mean of its divisors is an integer number (21140736).

Almost surely, 2^84122321 is an apocalyptic number.

It is an amenable number.

84122321 is a deficient number, since it is larger than the sum of its proper divisors (440623).

84122321 is a wasteful number, since it uses less digits than its factorization.

84122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440622.

The product of its digits is 768, while the sum is 23.

The square root of 84122321 is about 9171.8221199498. The cubic root of 84122321 is about 438.1643930912.

Adding to 84122321 its reverse (12322148), we get a palindrome (96444469).

The spelling of 84122321 in words is "eighty-four million, one hundred twenty-two thousand, three hundred twenty-one".