16864847 has 2 divisors, whose sum is σ = 16864848. Its totient is φ = 16864846.

The previous prime is 16864831. The next prime is 16864873. The reversal of 16864847 is 74846861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16864847 - 2⁴ = 16864831 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16864798 and 16864807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16864447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432423 + 8432424.

It is an arithmetic number, because the mean of its divisors is an integer number (8432424).

Almost surely, 2^16864847 is an apocalyptic number.

16864847 is a deficient number, since it is larger than the sum of its proper divisors (1).

16864847 is an equidigital number, since it uses as much as digits as its factorization.

16864847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 44.

The square root of 16864847 is about 4106.6832115468. The cubic root of 16864847 is about 256.4449405383. Note that the first 3 decimals are identical.

The spelling of 16864847 in words is "sixteen million, eight hundred sixty-four thousand, eight hundred forty-seven".