9978297 has 32 divisors (see below), whose sum is σ = 16140288. Its totient is φ = 5360256.

The previous prime is 9978289. The next prime is 9978301. The reversal of 9978297 is 7928799.

It is a happy number.

It is not a de Polignac number, because 9978297 - 2³ = 9978289 is a prime.

It is a super-2 number, since 2×9978297² = 199132822040418, which contains 22 as substring.

9978297 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9978277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35118 + ... + 35400.

It is an arithmetic number, because the mean of its divisors is an integer number (504384).

Almost surely, 2^9978297 is an apocalyptic number.

It is an amenable number.

9978297 is a deficient number, since it is larger than the sum of its proper divisors (6161991).

9978297 is a wasteful number, since it uses less digits than its factorization.

9978297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

The product of its digits is 571536, while the sum is 51.

The square root of 9978297 is about 3158.8442506714. The cubic root of 9978297 is about 215.2874971265.

The spelling of 9978297 in words is "nine million, nine hundred seventy-eight thousand, two hundred ninety-seven".