9901187 has 2 divisors, whose sum is σ = 9901188. Its totient is φ = 9901186.

The previous prime is 9901159. The next prime is 9901189. The reversal of 9901187 is 7811099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9901187 - 2⁸ = 9900931 is a prime.

Together with 9901189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9901189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950593 + 4950594.

It is an arithmetic number, because the mean of its divisors is an integer number (4950594).

Almost surely, 2^9901187 is an apocalyptic number.

9901187 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901187 is an equidigital number, since it uses as much as digits as its factorization.

9901187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 9901187 is about 3146.6151655390. The cubic root of 9901187 is about 214.7314982459.

The spelling of 9901187 in words is "nine million, nine hundred one thousand, one hundred eighty-seven".