864842137 has 2 divisors, whose sum is σ = 864842138. Its totient is φ = 864842136.

The previous prime is 864842063. The next prime is 864842141. The reversal of 864842137 is 731248468.

864842137 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., 467597376 + 397244761 = 21624^2 + 19931^2 .

It is a cyclic number.

It is not a de Polignac number, because 864842137 - 2¹⁹ = 864317849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864842093 and 864842102.

It is not a weakly prime, because it can be changed into another prime (864846137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432421068 + 432421069.

It is an arithmetic number, because the mean of its divisors is an integer number (432421069).

Almost surely, 2^864842137 is an apocalyptic number.

It is an amenable number.

864842137 is a deficient number, since it is larger than the sum of its proper divisors (1).

864842137 is an equidigital number, since it uses as much as digits as its factorization.

864842137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The square root of 864842137 is about 29408.1984657340. The cubic root of 864842137 is about 952.7499772613.

The spelling of 864842137 in words is "eight hundred sixty-four million, eight hundred forty-two thousand, one hundred thirty-seven".