84032281 has 2 divisors, whose sum is σ = 84032282. Its totient is φ = 84032280.

The previous prime is 84032239. The next prime is 84032293. The reversal of 84032281 is 18223048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44342281 + 39690000 = 6659^2 + 6300^2 .

It is a cyclic number.

It is not a de Polignac number, because 84032281 - 2⁹ = 84031769 is a prime.

It is a super-2 number, since 2×84032281² = 14122848500125922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84039281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42016140 + 42016141.

It is an arithmetic number, because the mean of its divisors is an integer number (42016141).

Almost surely, 2^84032281 is an apocalyptic number.

It is an amenable number.

84032281 is a deficient number, since it is larger than the sum of its proper divisors (1).

84032281 is an equidigital number, since it uses as much as digits as its factorization.

84032281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 84032281 is about 9166.9122936788. The cubic root of 84032281 is about 438.0080080964.

The spelling of 84032281 in words is "eighty-four million, thirty-two thousand, two hundred eighty-one".