6864553 has 2 divisors, whose sum is σ = 6864554. Its totient is φ = 6864552.

The previous prime is 6864541. The next prime is 6864581. The reversal of 6864553 is 3554686.

6864553 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4032064 + 2832489 = 2008^2 + 1683^2 .

It is a cyclic number.

It is not a de Polignac number, because 6864553 - 2⁵ = 6864521 is a prime.

6864553 is a lucky number.

It is a nialpdrome in base 14.

It is not a weakly prime, because it can be changed into another prime (6864523) 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, 3432276 + 3432277.

It is an arithmetic number, because the mean of its divisors is an integer number (3432277).

Almost surely, 2^6864553 is an apocalyptic number.

It is an amenable number.

6864553 is a deficient number, since it is larger than the sum of its proper divisors (1).

6864553 is an equidigital number, since it uses as much as digits as its factorization.

6864553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 37.

The square root of 6864553 is about 2620.0291983106. The cubic root of 6864553 is about 190.0512604074.

The spelling of 6864553 in words is "six million, eight hundred sixty-four thousand, five hundred fifty-three".