864533 has 2 divisors, whose sum is σ = 864534. Its totient is φ = 864532.

The previous prime is 864511. The next prime is 864541. The reversal of 864533 is 335468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 611524 + 253009 = 782^2 + 503^2 .

It is a cyclic number.

It is not a de Polignac number, because 864533 - 2⁸ = 864277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864496 and 864505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432266 + 432267.

It is an arithmetic number, because the mean of its divisors is an integer number (432267).

2⁸⁶⁴⁵³³ is an apocalyptic number.

It is an amenable number.

864533 is a deficient number, since it is larger than the sum of its proper divisors (1).

864533 is an equidigital number, since it uses as much as digits as its factorization.

864533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 864533 is about 929.8026672364. The cubic root of 864533 is about 95.2636443875.

The spelling of 864533 in words is "eight hundred sixty-four thousand, five hundred thirty-three".