864503 has 2 divisors, whose sum is σ = 864504. Its totient is φ = 864502.

The previous prime is 864491. The next prime is 864509. The reversal of 864503 is 305468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 864503 - 2⁶ = 864439 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432251 + 432252.

It is an arithmetic number, because the mean of its divisors is an integer number (432252).

2⁸⁶⁴⁵⁰³ is an apocalyptic number.

864503 is a deficient number, since it is larger than the sum of its proper divisors (1).

864503 is an equidigital number, since it uses as much as digits as its factorization.

864503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 864503 is about 929.7865346412. The cubic root of 864503 is about 95.2625424660.

The spelling of 864503 in words is "eight hundred sixty-four thousand, five hundred three".