9988291 has 2 divisors, whose sum is σ = 9988292. Its totient is φ = 9988290.

The previous prime is 9988283. The next prime is 9988301. The reversal of 9988291 is 1928899.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9988291 - 2³ = 9988283 is a prime.

It is not a weakly prime, because it can be changed into another prime (9988211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994145 + 4994146.

It is an arithmetic number, because the mean of its divisors is an integer number (4994146).

Almost surely, 2^9988291 is an apocalyptic number.

9988291 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988291 is an equidigital number, since it uses as much as digits as its factorization.

9988291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 46.

The square root of 9988291 is about 3160.4257624567. The cubic root of 9988291 is about 215.3593485765.

The spelling of 9988291 in words is "nine million, nine hundred eighty-eight thousand, two hundred ninety-one".