84859867 has 2 divisors, whose sum is σ = 84859868. Its totient is φ = 84859866.

The previous prime is 84859861. The next prime is 84859883. The reversal of 84859867 is 76895848.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84859867 - 2¹⁹ = 84335579 is a prime.

It is not a weakly prime, because it can be changed into another prime (84859861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42429933 + 42429934.

It is an arithmetic number, because the mean of its divisors is an integer number (42429934).

Almost surely, 2^84859867 is an apocalyptic number.

84859867 is a deficient number, since it is larger than the sum of its proper divisors (1).

84859867 is an equidigital number, since it uses as much as digits as its factorization.

84859867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 55.

The square root of 84859867 is about 9211.9415434533. The cubic root of 84859867 is about 439.4412104167.

The spelling of 84859867 in words is "eighty-four million, eight hundred fifty-nine thousand, eight hundred sixty-seven".