84147643 has 2 divisors, whose sum is σ = 84147644. Its totient is φ = 84147642.

The previous prime is 84147607. The next prime is 84147659. The reversal of 84147643 is 34674148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84147643 - 2²¹ = 82050491 is a prime.

It is not a weakly prime, because it can be changed into another prime (84147743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42073821 + 42073822.

It is an arithmetic number, because the mean of its divisors is an integer number (42073822).

Almost surely, 2^84147643 is an apocalyptic number.

84147643 is a deficient number, since it is larger than the sum of its proper divisors (1).

84147643 is an equidigital number, since it uses as much as digits as its factorization.

84147643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The square root of 84147643 is about 9173.2024397154. The cubic root of 84147643 is about 438.2083532259.

It can be divided in two parts, 841 and 47643, that added together give a palindrome (48484).

The spelling of 84147643 in words is "eighty-four million, one hundred forty-seven thousand, six hundred forty-three".