864277 has 2 divisors, whose sum is σ = 864278. Its totient is φ = 864276.

The previous prime is 864251. The next prime is 864289. The reversal of 864277 is 772468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 579121 + 285156 = 761^2 + 534^2 .

It is a cyclic number.

It is not a de Polignac number, because 864277 - 2¹¹ = 862229 is a prime.

864277 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432138 + 432139.

It is an arithmetic number, because the mean of its divisors is an integer number (432139).

2⁸⁶⁴²⁷⁷ is an apocalyptic number.

It is an amenable number.

864277 is a deficient number, since it is larger than the sum of its proper divisors (1).

864277 is an equidigital number, since it uses as much as digits as its factorization.

864277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 864277 is about 929.6649934251. The cubic root of 864277 is about 95.2542405049.

Subtracting from 864277 its reverse (772468), we obtain a square (91809 = 303²).

The spelling of 864277 in words is "eight hundred sixty-four thousand, two hundred seventy-seven".