84840043 has 2 divisors, whose sum is σ = 84840044. Its totient is φ = 84840042.

The previous prime is 84839999. The next prime is 84840059. The reversal of 84840043 is 34004848.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84840043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84839987 and 84840014.

It is not a weakly prime, because it can be changed into another prime (84840083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42420021 + 42420022.

It is an arithmetic number, because the mean of its divisors is an integer number (42420022).

Almost surely, 2^84840043 is an apocalyptic number.

84840043 is a deficient number, since it is larger than the sum of its proper divisors (1).

84840043 is an equidigital number, since it uses as much as digits as its factorization.

84840043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 84840043 is about 9210.8654859356. The cubic root of 84840043 is about 439.4069886607.

The spelling of 84840043 in words is "eighty-four million, eight hundred forty thousand, forty-three".