84964639 has 2 divisors, whose sum is σ = 84964640. Its totient is φ = 84964638.

The previous prime is 84964619. The next prime is 84964681. The reversal of 84964639 is 93646948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84964639 - 2⁹ = 84964127 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84964592 and 84964601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84964619) 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, 42482319 + 42482320.

It is an arithmetic number, because the mean of its divisors is an integer number (42482320).

Almost surely, 2^84964639 is an apocalyptic number.

84964639 is a deficient number, since it is larger than the sum of its proper divisors (1).

84964639 is an equidigital number, since it uses as much as digits as its factorization.

84964639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 49.

The square root of 84964639 is about 9217.6265383232. The cubic root of 84964639 is about 439.6219876633.

The spelling of 84964639 in words is "eighty-four million, nine hundred sixty-four thousand, six hundred thirty-nine".