864503009 has 2 divisors, whose sum is σ = 864503010. Its totient is φ = 864503008.

The previous prime is 864502993. The next prime is 864503027. The reversal of 864503009 is 900305468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 771283984 + 93219025 = 27772^2 + 9655^2 .

It is a cyclic number.

It is not a de Polignac number, because 864503009 - 2⁴ = 864502993 is a prime.

It is a super-6 number, since 6×864503009⁶ (a number of 55 digits) contains 666666 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864503009.

It is not a weakly prime, because it can be changed into another prime (864503069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432251504 + 432251505.

It is an arithmetic number, because the mean of its divisors is an integer number (432251505).

Almost surely, 2^864503009 is an apocalyptic number.

It is an amenable number.

864503009 is a deficient number, since it is larger than the sum of its proper divisors (1).

864503009 is an equidigital number, since it uses as much as digits as its factorization.

864503009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 864503009 is about 29402.4320252594. The cubic root of 864503009 is about 952.6254279660.

The spelling of 864503009 in words is "eight hundred sixty-four million, five hundred three thousand, nine".