862686361 has 2 divisors, whose sum is σ = 862686362. Its totient is φ = 862686360.

The previous prime is 862686359. The next prime is 862686373. The reversal of 862686361 is 163686268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 851530761 + 11155600 = 29181^2 + 3340^2 .

It is a cyclic number.

It is not a de Polignac number, because 862686361 - 2¹ = 862686359 is a prime.

Together with 862686359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (862686761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431343180 + 431343181.

It is an arithmetic number, because the mean of its divisors is an integer number (431343181).

Almost surely, 2^862686361 is an apocalyptic number.

It is an amenable number.

862686361 is a deficient number, since it is larger than the sum of its proper divisors (1).

862686361 is an equidigital number, since it uses as much as digits as its factorization.

862686361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 46.

The square root of 862686361 is about 29371.5229601735. The cubic root of 862686361 is about 951.9576845025.

It can be divided in two parts, 86268 and 6361, that added together give a palindrome (92629).

The spelling of 862686361 in words is "eight hundred sixty-two million, six hundred eighty-six thousand, three hundred sixty-one".