9887797 has 2 divisors, whose sum is σ = 9887798. Its totient is φ = 9887796.

The previous prime is 9887783. The next prime is 9887819. The reversal of 9887797 is 7977889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8708401 + 1179396 = 2951^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 9887797 - 2¹¹ = 9885749 is a prime.

9887797 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9887747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4943898 + 4943899.

It is an arithmetic number, because the mean of its divisors is an integer number (4943899).

Almost surely, 2^9887797 is an apocalyptic number.

It is an amenable number.

9887797 is a deficient number, since it is larger than the sum of its proper divisors (1).

9887797 is an equidigital number, since it uses as much as digits as its factorization.

9887797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 55.

The square root of 9887797 is about 3144.4867625735. The cubic root of 9887797 is about 214.6346562590.

The spelling of 9887797 in words is "nine million, eight hundred eighty-seven thousand, seven hundred ninety-seven".