84568491 has 24 divisors (see below), whose sum is σ = 140684544. Its totient is φ = 47951280.

The previous prime is 84568483. The next prime is 84568499. The reversal of 84568491 is 19486548.

84568491 is a `hidden beast` number, since 84 + 568 + 4 + 9 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (84568483) and next prime (84568499).

It is not a de Polignac number, because 84568491 - 2³ = 84568483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84568499) 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 in 23 ways as a sum of consecutive naturals, for example, 3130 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (5861856).

Almost surely, 2^84568491 is an apocalyptic number.

84568491 is a deficient number, since it is larger than the sum of its proper divisors (56116053).

84568491 is a wasteful number, since it uses less digits than its factorization.

84568491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10391 (or 10388 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 84568491 is about 9196.1128200996. The cubic root of 84568491 is about 438.9376765458.

The spelling of 84568491 in words is "eighty-four million, five hundred sixty-eight thousand, four hundred ninety-one".