84642471 has 24 divisors (see below), whose sum is σ = 124422480. Its totient is φ = 55440000.

The previous prime is 84642463. The next prime is 84642479. The reversal of 84642471 is 17424648.

84642471 is a `hidden beast` number, since 8 + 4 + 642 + 4 + 7 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (84642463) and next prime (84642479).

It is not a de Polignac number, because 84642471 - 2³ = 84642463 is a prime.

It is a super-3 number, since 3×84642471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84642479) 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, 200841 + ... + 201261.

It is an arithmetic number, because the mean of its divisors is an integer number (5184270).

Almost surely, 2^84642471 is an apocalyptic number.

84642471 is a deficient number, since it is larger than the sum of its proper divisors (39780009).

84642471 is a wasteful number, since it uses less digits than its factorization.

84642471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 764 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 84642471 is about 9200.1342924981. The cubic root of 84642471 is about 439.0656325752.

The spelling of 84642471 in words is "eighty-four million, six hundred forty-two thousand, four hundred seventy-one".