9888887 has 2 divisors, whose sum is σ = 9888888. Its totient is φ = 9888886.

The previous prime is 9888881. The next prime is 9888889. The reversal of 9888887 is 7888889.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9888887 - 2⁴ = 9888871 is a prime.

It is a super-3 number, since 3×9888887³ (a number of 22 digits) contains 333 as substring.

Together with 9888889, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9888881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4944443 + 4944444.

It is an arithmetic number, because the mean of its divisors is an integer number (4944444).

Almost surely, 2^9888887 is an apocalyptic number.

9888887 is a deficient number, since it is larger than the sum of its proper divisors (1).

9888887 is an equidigital number, since it uses as much as digits as its factorization.

9888887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2064384, while the sum is 56.

The square root of 9888887 is about 3144.6600770195. The cubic root of 9888887 is about 214.6425428549.

The spelling of 9888887 in words is "nine million, eight hundred eighty-eight thousand, eight hundred eighty-seven".