84492981 has 24 divisors (see below), whose sum is σ = 131214720. Its totient is φ = 52223616.

The previous prime is 84492937. The next prime is 84492997. The reversal of 84492981 is 18929448.

84492981 is a `hidden beast` number, since 84 + 492 + 9 + 81 = 666.

It is not a de Polignac number, because 84492981 - 2⁷ = 84492853 is a prime.

It is a super-2 number, since 2×84492981² = 14278127676532722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84492931) 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 in 23 ways as a sum of consecutive naturals, for example, 2781 + ... + 13293.

It is an arithmetic number, because the mean of its divisors is an integer number (5467280).

Almost surely, 2^84492981 is an apocalyptic number.

It is an amenable number.

84492981 is a deficient number, since it is larger than the sum of its proper divisors (46721739).

84492981 is a wasteful number, since it uses less digits than its factorization.

84492981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10585 (or 10582 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 84492981 is about 9192.0063642276. The cubic root of 84492981 is about 438.8069972462.

The spelling of 84492981 in words is "eighty-four million, four hundred ninety-two thousand, nine hundred eighty-one".