9998587 has 2 divisors, whose sum is σ = 9998588. Its totient is φ = 9998586.

The previous prime is 9998581. The next prime is 9998603. The reversal of 9998587 is 7858999.

9998587 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9998587 - 2⁷ = 9998459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9998581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999293 + 4999294.

It is an arithmetic number, because the mean of its divisors is an integer number (4999294).

Almost surely, 2^9998587 is an apocalyptic number.

9998587 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998587 is an equidigital number, since it uses as much as digits as its factorization.

9998587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 55.

The square root of 9998587 is about 3162.0542373590. The cubic root of 9998587 is about 215.4333211378.

It can be divided in two parts, 9998 and 587, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 9998587 in words is "nine million, nine hundred ninety-eight thousand, five hundred eighty-seven".