9897287 has 2 divisors, whose sum is σ = 9897288. Its totient is φ = 9897286.

The previous prime is 9897263. The next prime is 9897313. The reversal of 9897287 is 7827989.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9897287 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9897227) 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, 4948643 + 4948644.

It is an arithmetic number, because the mean of its divisors is an integer number (4948644).

Almost surely, 2^9897287 is an apocalyptic number.

9897287 is a deficient number, since it is larger than the sum of its proper divisors (1).

9897287 is an equidigital number, since it uses as much as digits as its factorization.

9897287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 50.

The square root of 9897287 is about 3145.9953909693. The cubic root of 9897287 is about 214.7033008583.

The spelling of 9897287 in words is "nine million, eight hundred ninety-seven thousand, two hundred eighty-seven".