84709843 has 2 divisors, whose sum is σ = 84709844. Its totient is φ = 84709842.

The previous prime is 84709829. The next prime is 84709853. The reversal of 84709843 is 34890748.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84709843 is a prime.

It is equal to p_4927876 and since 84709843 and 4927876 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84709843.

It is not a weakly prime, because it can be changed into another prime (84709853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42354921 + 42354922.

It is an arithmetic number, because the mean of its divisors is an integer number (42354922).

Almost surely, 2^84709843 is an apocalyptic number.

84709843 is a deficient number, since it is larger than the sum of its proper divisors (1).

84709843 is an equidigital number, since it uses as much as digits as its factorization.

84709843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 84709843 is about 9203.7950324852. The cubic root of 84709843 is about 439.1820945379.

The spelling of 84709843 in words is "eighty-four million, seven hundred nine thousand, eight hundred forty-three".