887494858781 has 2 divisors, whose sum is σ = 887494858782. Its totient is φ = 887494858780.

The previous prime is 887494858763. The next prime is 887494858847. The reversal of 887494858781 is 187858494788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643195980025 + 244298878756 = 801995^2 + 494266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-887494858781 is a prime.

It is a super-2 number, since 2×887494858781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (887494851781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443747429390 + 443747429391.

It is an arithmetic number, because the mean of its divisors is an integer number (443747429391).

Almost surely, 2^887494858781 is an apocalyptic number.

It is an amenable number.

887494858781 is a deficient number, since it is larger than the sum of its proper divisors (1).

887494858781 is an equidigital number, since it uses as much as digits as its factorization.

887494858781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1156055040, while the sum is 77.

The spelling of 887494858781 in words is "eight hundred eighty-seven billion, four hundred ninety-four million, eight hundred fifty-eight thousand, seven hundred eighty-one".