862706681 has 2 divisors, whose sum is σ = 862706682. Its totient is φ = 862706680.

The previous prime is 862706671. The next prime is 862706683. The reversal of 862706681 is 186607268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 713744656 + 148962025 = 26716^2 + 12205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-862706681 is a prime.

It is a super-2 number, since 2×862706681² = 1488525634884071522, which contains 22 as substring.

Together with 862706683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (862706683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431353340 + 431353341.

It is an arithmetic number, because the mean of its divisors is an integer number (431353341).

Almost surely, 2^862706681 is an apocalyptic number.

It is an amenable number.

862706681 is a deficient number, since it is larger than the sum of its proper divisors (1).

862706681 is an equidigital number, since it uses as much as digits as its factorization.

862706681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 862706681 is about 29371.8688714219. The cubic root of 862706681 is about 951.9651586859.

The spelling of 862706681 in words is "eight hundred sixty-two million, seven hundred six thousand, six hundred eighty-one".