864677993 has 2 divisors, whose sum is σ = 864677994. Its totient is φ = 864677992.

The previous prime is 864677977. The next prime is 864678019. The reversal of 864677993 is 399776468.

864677993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637663504 + 227014489 = 25252^2 + 15067^2 .

It is a cyclic number.

It is not a de Polignac number, because 864677993 - 2⁴ = 864677977 is a prime.

It is not a weakly prime, because it can be changed into another prime (864677923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432338996 + 432338997.

It is an arithmetic number, because the mean of its divisors is an integer number (432338997).

Almost surely, 2^864677993 is an apocalyptic number.

It is an amenable number.

864677993 is a deficient number, since it is larger than the sum of its proper divisors (1).

864677993 is an equidigital number, since it uses as much as digits as its factorization.

864677993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 59.

The square root of 864677993 is about 29405.4075469122. The cubic root of 864677993 is about 952.6896972478.

The spelling of 864677993 in words is "eight hundred sixty-four million, six hundred seventy-seven thousand, nine hundred ninety-three".