864229813 has 2 divisors, whose sum is σ = 864229814. Its totient is φ = 864229812.

The previous prime is 864229787. The next prime is 864229829. The reversal of 864229813 is 318922468.

864229813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461304484 + 402925329 = 21478^2 + 20073^2 .

It is a cyclic number.

It is not a de Polignac number, because 864229813 - 2¹³ = 864221621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864229813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864229213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432114906 + 432114907.

It is an arithmetic number, because the mean of its divisors is an integer number (432114907).

Almost surely, 2^864229813 is an apocalyptic number.

It is an amenable number.

864229813 is a deficient number, since it is larger than the sum of its proper divisors (1).

864229813 is an equidigital number, since it uses as much as digits as its factorization.

864229813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 864229813 is about 29397.7858519991. The cubic root of 864229813 is about 952.5250693888.

The spelling of 864229813 in words is "eight hundred sixty-four million, two hundred twenty-nine thousand, eight hundred thirteen".