84828649 has 4 divisors (see below), whose sum is σ = 84878164. Its totient is φ = 84779136.

The previous prime is 84828643. The next prime is 84828677. The reversal of 84828649 is 94682848.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20187049 + 64641600 = 4493^2 + 8040^2 .

It is a cyclic number.

It is not a de Polignac number, because 84828649 - 2³ = 84828641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84828641) 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 in 3 ways as a sum of consecutive naturals, for example, 22092 + ... + 25645.

It is an arithmetic number, because the mean of its divisors is an integer number (21219541).

Almost surely, 2^84828649 is an apocalyptic number.

It is an amenable number.

84828649 is a deficient number, since it is larger than the sum of its proper divisors (49515).

84828649 is a wasteful number, since it uses less digits than its factorization.

84828649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49514.

The product of its digits is 884736, while the sum is 49.

The square root of 84828649 is about 9210.2469565153. The cubic root of 84828649 is about 439.3873170245.

The spelling of 84828649 in words is "eighty-four million, eight hundred twenty-eight thousand, six hundred forty-nine".