864321111 has 12 divisors (see below), whose sum is σ = 1294703592. Its totient is φ = 576213912.

The previous prime is 864321103. The next prime is 864321121. The reversal of 864321111 is 111123468.

It is a happy number.

864321111 is a `hidden beast` number, since 8 + 643 + 2 + 1 + 1 + 11 = 666.

It is not a de Polignac number, because 864321111 - 2³ = 864321103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864321121) 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 in 11 ways as a sum of consecutive naturals, for example, 1778196 + ... + 1778681.

It is an arithmetic number, because the mean of its divisors is an integer number (107891966).

Almost surely, 2^864321111 is an apocalyptic number.

864321111 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

864321111 is a deficient number, since it is larger than the sum of its proper divisors (430382481).

864321111 is an equidigital number, since it uses as much as digits as its factorization.

864321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556892 (or 3556880 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 864321111 is about 29399.3386150097. The cubic root of 864321111 is about 952.5586100707.

Adding to 864321111 its reverse (111123468), we get a palindrome (975444579).

The spelling of 864321111 in words is "eight hundred sixty-four million, three hundred twenty-one thousand, one hundred eleven".