887561539 has 2 divisors, whose sum is σ = 887561540. Its totient is φ = 887561538.

The previous prime is 887561537. The next prime is 887561599. The reversal of 887561539 is 935165788.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 887561539 - 2¹ = 887561537 is a prime.

Together with 887561537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (887561531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443780769 + 443780770.

It is an arithmetic number, because the mean of its divisors is an integer number (443780770).

Almost surely, 2^887561539 is an apocalyptic number.

887561539 is a deficient number, since it is larger than the sum of its proper divisors (1).

887561539 is an equidigital number, since it uses as much as digits as its factorization.

887561539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 52.

The square root of 887561539 is about 29791.9710492609. The cubic root of 887561539 is about 961.0208826664.

The spelling of 887561539 in words is "eight hundred eighty-seven million, five hundred sixty-one thousand, five hundred thirty-nine".