84180329 has 2 divisors, whose sum is σ = 84180330. Its totient is φ = 84180328.

The previous prime is 84180293. The next prime is 84180361. The reversal of 84180329 is 92308148.

It is a happy number.

Together with previous prime (84180293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63568729 + 20611600 = 7973^2 + 4540^2 .

It is a cyclic number.

It is not a de Polignac number, because 84180329 - 2¹² = 84176233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84180389) 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 as a sum of consecutive naturals, namely, 42090164 + 42090165.

It is an arithmetic number, because the mean of its divisors is an integer number (42090165).

Almost surely, 2^84180329 is an apocalyptic number.

It is an amenable number.

84180329 is a deficient number, since it is larger than the sum of its proper divisors (1).

84180329 is an equidigital number, since it uses as much as digits as its factorization.

84180329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 84180329 is about 9174.9838691956. The cubic root of 84180329 is about 438.2650845597.

The spelling of 84180329 in words is "eighty-four million, one hundred eighty thousand, three hundred twenty-nine".