9881887 has 2 divisors, whose sum is σ = 9881888. Its totient is φ = 9881886.

The previous prime is 9881869. The next prime is 9881899. The reversal of 9881887 is 7881889.

It is a strong prime.

It is an emirp because it is prime and its reverse (7881889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9881887 - 2²³ = 1493279 is a prime.

9881887 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9881887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9881827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4940943 + 4940944.

It is an arithmetic number, because the mean of its divisors is an integer number (4940944).

Almost surely, 2^9881887 is an apocalyptic number.

9881887 is a deficient number, since it is larger than the sum of its proper divisors (1).

9881887 is an equidigital number, since it uses as much as digits as its factorization.

9881887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 49.

The square root of 9881887 is about 3143.5468821063. The cubic root of 9881887 is about 214.5918848971.

The spelling of 9881887 in words is "nine million, eight hundred eighty-one thousand, eight hundred eighty-seven".