9940997 has 12 divisors (see below), whose sum is σ = 11307660. Its totient is φ = 8722560.

The previous prime is 9940963. The next prime is 9941003. The reversal of 9940997 is 7990499.

It can be written as a sum of positive squares in 2 ways, for example, as 4553956 + 5387041 = 2134^2 + 2321^2 .

It is not a de Polignac number, because 9940997 - 2⁸ = 9940741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2093 + ... + 4925.

It is an arithmetic number, because the mean of its divisors is an integer number (942305).

Almost surely, 2^9940997 is an apocalyptic number.

It is an amenable number.

9940997 is a deficient number, since it is larger than the sum of its proper divisors (1366663).

9940997 is a wasteful number, since it uses less digits than its factorization.

9940997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884 (or 2873 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 9940997 is about 3152.9346647211. The cubic root of 9940997 is about 215.0189058551.

The spelling of 9940997 in words is "nine million, nine hundred forty thousand, nine hundred ninety-seven".