84280643 has 2 divisors, whose sum is σ = 84280644. Its totient is φ = 84280642.

The previous prime is 84280631. The next prime is 84280657. The reversal of 84280643 is 34608248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84280643 - 2¹⁰ = 84279619 is a prime.

It is not a weakly prime, because it can be changed into another prime (84280613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42140321 + 42140322.

It is an arithmetic number, because the mean of its divisors is an integer number (42140322).

Almost surely, 2^84280643 is an apocalyptic number.

84280643 is a deficient number, since it is larger than the sum of its proper divisors (1).

84280643 is an equidigital number, since it uses as much as digits as its factorization.

84280643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 84280643 is about 9180.4489541634. The cubic root of 84280643 is about 438.4391025375.

The spelling of 84280643 in words is "eighty-four million, two hundred eighty thousand, six hundred forty-three".