887881021 has 2 divisors, whose sum is σ = 887881022. Its totient is φ = 887881020.

The previous prime is 887880997. The next prime is 887881063. The reversal of 887881021 is 120188788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887444100 + 436921 = 29790^2 + 661^2 .

It is a cyclic number.

It is not a de Polignac number, because 887881021 - 2⁵ = 887880989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (887881091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443940510 + 443940511.

It is an arithmetic number, because the mean of its divisors is an integer number (443940511).

Almost surely, 2^887881021 is an apocalyptic number.

It is an amenable number.

887881021 is a deficient number, since it is larger than the sum of its proper divisors (1).

887881021 is an equidigital number, since it uses as much as digits as its factorization.

887881021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57344, while the sum is 43.

The square root of 887881021 is about 29797.3324477209. The cubic root of 887881021 is about 961.1361768474.

The spelling of 887881021 in words is "eight hundred eighty-seven million, eight hundred eighty-one thousand, twenty-one".