9897775 has 12 divisors (see below), whose sum is σ = 12312952. Its totient is φ = 7892640.

The previous prime is 9897761. The next prime is 9897793. The reversal of 9897775 is 5777989.

It is not a de Polignac number, because 9897775 - 2⁵ = 9897743 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12697 + ... + 13453.

Almost surely, 2^9897775 is an apocalyptic number.

9897775 is a deficient number, since it is larger than the sum of its proper divisors (2415177).

9897775 is a wasteful number, since it uses less digits than its factorization.

9897775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290 (or 1285 counting only the distinct ones).

The product of its digits is 1111320, while the sum is 52.

The square root of 9897775 is about 3146.0729489317. The cubic root of 9897775 is about 214.7068295522.

The spelling of 9897775 in words is "nine million, eight hundred ninety-seven thousand, seven hundred seventy-five".