864989803 has 2 divisors, whose sum is σ = 864989804. Its totient is φ = 864989802.

The previous prime is 864989791. The next prime is 864989813. The reversal of 864989803 is 308989468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 864989803 - 2⁵ = 864989771 is a prime.

It is not a weakly prime, because it can be changed into another prime (864989813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432494901 + 432494902.

It is an arithmetic number, because the mean of its divisors is an integer number (432494902).

Almost surely, 2^864989803 is an apocalyptic number.

864989803 is a deficient number, since it is larger than the sum of its proper divisors (1).

864989803 is an equidigital number, since it uses as much as digits as its factorization.

864989803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The square root of 864989803 is about 29410.7089849939. The cubic root of 864989803 is about 952.8041994003.

The spelling of 864989803 in words is "eight hundred sixty-four million, nine hundred eighty-nine thousand, eight hundred three".