864733813 has 2 divisors, whose sum is σ = 864733814. Its totient is φ = 864733812.

The previous prime is 864733799. The next prime is 864733817. The reversal of 864733813 is 318337468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 546717924 + 318015889 = 23382^2 + 17833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864733813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864733813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864733817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432366906 + 432366907.

It is an arithmetic number, because the mean of its divisors is an integer number (432366907).

Almost surely, 2^864733813 is an apocalyptic number.

It is an amenable number.

864733813 is a deficient number, since it is larger than the sum of its proper divisors (1).

864733813 is an equidigital number, since it uses as much as digits as its factorization.

864733813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 864733813 is about 29406.3566767459. The cubic root of 864733813 is about 952.7101973626.

The spelling of 864733813 in words is "eight hundred sixty-four million, seven hundred thirty-three thousand, eight hundred thirteen".