84643123 has 2 divisors, whose sum is σ = 84643124. Its totient is φ = 84643122.

The previous prime is 84643103. The next prime is 84643127. The reversal of 84643123 is 32134648.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84643123 - 2⁹ = 84642611 is a prime.

It is not a weakly prime, because it can be changed into another prime (84643127) 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 as a sum of consecutive naturals, namely, 42321561 + 42321562.

It is an arithmetic number, because the mean of its divisors is an integer number (42321562).

Almost surely, 2^84643123 is an apocalyptic number.

84643123 is a deficient number, since it is larger than the sum of its proper divisors (1).

84643123 is an equidigital number, since it uses as much as digits as its factorization.

84643123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 84643123 is about 9200.1697266953. The cubic root of 84643123 is about 439.0667599448.

The spelling of 84643123 in words is "eighty-four million, six hundred forty-three thousand, one hundred twenty-three".