84904849 has 2 divisors, whose sum is σ = 84904850. Its totient is φ = 84904848.

The previous prime is 84904847. The next prime is 84904873. The reversal of 84904849 is 94840948.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63680400 + 21224449 = 7980^2 + 4607^2 .

It is a cyclic number.

It is not a de Polignac number, because 84904849 - 2¹ = 84904847 is a prime.

Together with 84904847, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 84904799 and 84904808.

It is not a weakly prime, because it can be changed into another prime (84904847) 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, 42452424 + 42452425.

It is an arithmetic number, because the mean of its divisors is an integer number (42452425).

Almost surely, 2^84904849 is an apocalyptic number.

It is an amenable number.

84904849 is a deficient number, since it is larger than the sum of its proper divisors (1).

84904849 is an equidigital number, since it uses as much as digits as its factorization.

84904849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 84904849 is about 9214.3827248492. The cubic root of 84904849 is about 439.5188421391.

The spelling of 84904849 in words is "eighty-four million, nine hundred four thousand, eight hundred forty-nine".