887636641 has 2 divisors, whose sum is σ = 887636642. Its totient is φ = 887636640.

The previous prime is 887636639. The next prime is 887636683. The reversal of 887636641 is 146636788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474368400 + 413268241 = 21780^2 + 20329^2 .

It is a cyclic number.

It is not a de Polignac number, because 887636641 - 2¹ = 887636639 is a prime.

Together with 887636639, 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 (887636041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443818320 + 443818321.

It is an arithmetic number, because the mean of its divisors is an integer number (443818321).

Almost surely, 2^887636641 is an apocalyptic number.

It is an amenable number.

887636641 is a deficient number, since it is larger than the sum of its proper divisors (1).

887636641 is an equidigital number, since it uses as much as digits as its factorization.

887636641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 887636641 is about 29793.2314628675. The cubic root of 887636641 is about 961.0479878497.

The spelling of 887636641 in words is "eight hundred eighty-seven million, six hundred thirty-six thousand, six hundred forty-one".