864321001 has 6 divisors (see below), whose sum is σ = 912206202. Its totient is φ = 818830080.

The previous prime is 864320983. The next prime is 864321019. The reversal of 864321001 is 100123468.

It is an interprime number because it is at equal distance from previous prime (864320983) and next prime (864321019).

It can be written as a sum of positive squares in only one way, i.e., 781146601 + 83174400 = 27949^2 + 9120^2 .

It is not a de Polignac number, because 864321001 - 2⁵ = 864320969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864321091) 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 5 ways as a sum of consecutive naturals, for example, 1196760 + ... + 1197481.

It is an arithmetic number, because the mean of its divisors is an integer number (152034367).

Almost surely, 2^864321001 is an apocalyptic number.

It is an amenable number.

864321001 is a deficient number, since it is larger than the sum of its proper divisors (47885201).

864321001 is a wasteful number, since it uses less digits than its factorization.

864321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2394279 (or 2394260 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 864321001 is about 29399.3367442192. The cubic root of 864321001 is about 952.5585696608.

Adding to 864321001 its reverse (100123468), we get a palindrome (964444469).

The spelling of 864321001 in words is "eight hundred sixty-four million, three hundred twenty-one thousand, one".