864124817 has 2 divisors, whose sum is σ = 864124818. Its totient is φ = 864124816.

The previous prime is 864124799. The next prime is 864124837. The reversal of 864124817 is 718421468.

It is a Cunningham number, because it is equal to 29396²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 864124816 + 1 = 29396^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 864124817 - 2²⁰ = 863076241 is a prime.

It is a Chen prime.

It is equal to p_44268188 and since 864124817 and 44268188 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (864124837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432062408 + 432062409.

It is an arithmetic number, because the mean of its divisors is an integer number (432062409).

Almost surely, 2^864124817 is an apocalyptic number.

It is an amenable number.

864124817 is a deficient number, since it is larger than the sum of its proper divisors (1).

864124817 is an equidigital number, since it uses as much as digits as its factorization.

864124817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 41.

The square root of 864124817 is about 29396.0000170091. Note that the first 4 decimals coincide. The cubic root of 864124817 is about 952.4864934718.

The spelling of 864124817 in words is "eight hundred sixty-four million, one hundred twenty-four thousand, eight hundred seventeen".