868041487 has 2 divisors, whose sum is σ = 868041488. Its totient is φ = 868041486.

The previous prime is 868041443. The next prime is 868041521. The reversal of 868041487 is 784140868.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868041487 - 2⁷ = 868041359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868048487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434020743 + 434020744.

It is an arithmetic number, because the mean of its divisors is an integer number (434020744).

Almost surely, 2^868041487 is an apocalyptic number.

868041487 is a deficient number, since it is larger than the sum of its proper divisors (1).

868041487 is an equidigital number, since it uses as much as digits as its factorization.

868041487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 868041487 is about 29462.5437971673. The cubic root of 868041487 is about 953.9233820010.

The spelling of 868041487 in words is "eight hundred sixty-eight million, forty-one thousand, four hundred eighty-seven".