84812281 has 2 divisors, whose sum is σ = 84812282. Its totient is φ = 84812280.

The previous prime is 84812239. The next prime is 84812291. The reversal of 84812281 is 18221848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83557881 + 1254400 = 9141^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 84812281 - 2¹⁷ = 84681209 is a prime.

It is a super-2 number, since 2×84812281² = 14386246016845922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84812291) 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, 42406140 + 42406141.

It is an arithmetic number, because the mean of its divisors is an integer number (42406141).

Almost surely, 2^84812281 is an apocalyptic number.

It is an amenable number.

84812281 is a deficient number, since it is larger than the sum of its proper divisors (1).

84812281 is an equidigital number, since it uses as much as digits as its factorization.

84812281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8192, while the sum is 34.

The square root of 84812281 is about 9209.3583381254. The cubic root of 84812281 is about 439.3590547400.

The spelling of 84812281 in words is "eighty-four million, eight hundred twelve thousand, two hundred eighty-one".