84266981 has 2 divisors, whose sum is σ = 84266982. Its totient is φ = 84266980.

The previous prime is 84266921. The next prime is 84267037. The reversal of 84266981 is 18966248.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66161956 + 18105025 = 8134^2 + 4255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84266981 is a prime.

It is a super-2 number, since 2×84266981² = 14201848173708722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84266921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42133490 + 42133491.

It is an arithmetic number, because the mean of its divisors is an integer number (42133491).

Almost surely, 2^84266981 is an apocalyptic number.

It is an amenable number.

84266981 is a deficient number, since it is larger than the sum of its proper divisors (1).

84266981 is an equidigital number, since it uses as much as digits as its factorization.

84266981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 44.

The square root of 84266981 is about 9179.7048427496. The cubic root of 84266981 is about 438.4154107443.

The spelling of 84266981 in words is "eighty-four million, two hundred sixty-six thousand, nine hundred eighty-one".