9871157 has 2 divisors, whose sum is σ = 9871158. Its totient is φ = 9871156.

The previous prime is 9871111. The next prime is 9871159. The reversal of 9871157 is 7511789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6507601 + 3363556 = 2551^2 + 1834^2 .

It is an emirp because it is prime and its reverse (7511789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9871157 - 2⁶ = 9871093 is a prime.

Together with 9871159, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9871157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9871159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4935578 + 4935579.

It is an arithmetic number, because the mean of its divisors is an integer number (4935579).

Almost surely, 2^9871157 is an apocalyptic number.

It is an amenable number.

9871157 is a deficient number, since it is larger than the sum of its proper divisors (1).

9871157 is an equidigital number, since it uses as much as digits as its factorization.

9871157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 38.

The square root of 9871157 is about 3141.8397476638. The cubic root of 9871157 is about 214.5141870234.

The spelling of 9871157 in words is "nine million, eight hundred seventy-one thousand, one hundred fifty-seven".