84100321 has 2 divisors, whose sum is σ = 84100322. Its totient is φ = 84100320.

The previous prime is 84100301. The next prime is 84100333. The reversal of 84100321 is 12300148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83923921 + 176400 = 9161^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 84100321 - 2²¹ = 82003169 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84100301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42050160 + 42050161.

It is an arithmetic number, because the mean of its divisors is an integer number (42050161).

Almost surely, 2^84100321 is an apocalyptic number.

It is an amenable number.

84100321 is a deficient number, since it is larger than the sum of its proper divisors (1).

84100321 is an equidigital number, since it uses as much as digits as its factorization.

84100321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 84100321 is about 9170.6227160428. The cubic root of 84100321 is about 438.1261929363.

Adding to 84100321 its reverse (12300148), we get a palindrome (96400469).

The spelling of 84100321 in words is "eighty-four million, one hundred thousand, three hundred twenty-one".