84681967 has 2 divisors, whose sum is σ = 84681968. Its totient is φ = 84681966.

The previous prime is 84681953. The next prime is 84682019. The reversal of 84681967 is 76918648.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84681967 - 2¹⁹ = 84157679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84681967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84681907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42340983 + 42340984.

It is an arithmetic number, because the mean of its divisors is an integer number (42340984).

Almost surely, 2^84681967 is an apocalyptic number.

84681967 is a deficient number, since it is larger than the sum of its proper divisors (1).

84681967 is an equidigital number, since it uses as much as digits as its factorization.

84681967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 84681967 is about 9202.2805325637. The cubic root of 84681967 is about 439.1339144493.

The spelling of 84681967 in words is "eighty-four million, six hundred eighty-one thousand, nine hundred sixty-seven".