887881263721 has 2 divisors, whose sum is σ = 887881263722. Its totient is φ = 887881263720.

The previous prime is 887881263677. The next prime is 887881263743. The reversal of 887881263721 is 127362188788.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 765126331225 + 122754932496 = 874715^2 + 350364^2 .

It is a cyclic number.

It is not a de Polignac number, because 887881263721 - 2⁷ = 887881263593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 887881263721.

It is not a weakly prime, because it can be changed into another prime (887881263791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443940631860 + 443940631861.

It is an arithmetic number, because the mean of its divisors is an integer number (443940631861).

Almost surely, 2^887881263721 is an apocalyptic number.

It is an amenable number.

887881263721 is a deficient number, since it is larger than the sum of its proper divisors (1).

887881263721 is an equidigital number, since it uses as much as digits as its factorization.

887881263721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14450688, while the sum is 61.

The spelling of 887881263721 in words is "eight hundred eighty-seven billion, eight hundred eighty-one million, two hundred sixty-three thousand, seven hundred twenty-one".