864449 has 2 divisors, whose sum is σ = 864450. Its totient is φ = 864448.

The previous prime is 864439. The next prime is 864491. The reversal of 864449 is 944468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 692224 + 172225 = 832^2 + 415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864449 is a prime.

It is a super-4 number, since 4×864449⁴ (a number of 25 digits) contains 4444 as substring.

It is a Chen prime.

It is equal to p₆₈₆₇₈ and since 864449 and 68678 have the same sum of digits, it is a Honaker prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864449.

It is not a weakly prime, because it can be changed into another prime (864419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432224 + 432225.

It is an arithmetic number, because the mean of its divisors is an integer number (432225).

2⁸⁶⁴⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

864449 is a deficient number, since it is larger than the sum of its proper divisors (1).

864449 is an equidigital number, since it uses as much as digits as its factorization.

864449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The square root of 864449 is about 929.7574952642. The cubic root of 864449 is about 95.2605589432.

The spelling of 864449 in words is "eight hundred sixty-four thousand, four hundred forty-nine".