84565879 has 2 divisors, whose sum is σ = 84565880. Its totient is φ = 84565878.

The previous prime is 84565847. The next prime is 84565909. The reversal of 84565879 is 97856548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84565879 - 2⁵ = 84565847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84565829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42282939 + 42282940.

It is an arithmetic number, because the mean of its divisors is an integer number (42282940).

Almost surely, 2^84565879 is an apocalyptic number.

84565879 is a deficient number, since it is larger than the sum of its proper divisors (1).

84565879 is an equidigital number, since it uses as much as digits as its factorization.

84565879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 52.

The square root of 84565879 is about 9195.9708024765. The cubic root of 84565879 is about 438.9331574591.

The spelling of 84565879 in words is "eighty-four million, five hundred sixty-five thousand, eight hundred seventy-nine".