864863807 has 2 divisors, whose sum is σ = 864863808. Its totient is φ = 864863806.

The previous prime is 864863801. The next prime is 864863821. The reversal of 864863807 is 708368468.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 864863807 - 2¹⁰ = 864862783 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864863801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432431903 + 432431904.

It is an arithmetic number, because the mean of its divisors is an integer number (432431904).

Almost surely, 2^864863807 is an apocalyptic number.

864863807 is a deficient number, since it is larger than the sum of its proper divisors (1).

864863807 is an equidigital number, since it uses as much as digits as its factorization.

864863807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 50.

The square root of 864863807 is about 29408.5668980996. The cubic root of 864863807 is about 952.7579347520.

The spelling of 864863807 in words is "eight hundred sixty-four million, eight hundred sixty-three thousand, eight hundred seven".