864286873 has 2 divisors, whose sum is σ = 864286874. Its totient is φ = 864286872.

The previous prime is 864286859. The next prime is 864286883. The reversal of 864286873 is 378682468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638926729 + 225360144 = 25277^2 + 15012^2 .

It is a cyclic number.

It is not a de Polignac number, because 864286873 - 2⁹ = 864286361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864286873.

It is not a weakly prime, because it can be changed into another prime (864286823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432143436 + 432143437.

It is an arithmetic number, because the mean of its divisors is an integer number (432143437).

Almost surely, 2^864286873 is an apocalyptic number.

It is an amenable number.

864286873 is a deficient number, since it is larger than the sum of its proper divisors (1).

864286873 is an equidigital number, since it uses as much as digits as its factorization.

864286873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 52.

The square root of 864286873 is about 29398.7563172322. The cubic root of 864286873 is about 952.5460321326.

The spelling of 864286873 in words is "eight hundred sixty-four million, two hundred eighty-six thousand, eight hundred seventy-three".