9917397 has 20 divisors (see below), whose sum is σ = 16932256. Its totient is φ = 5666760.

The previous prime is 9917389. The next prime is 9917399. The reversal of 9917397 is 7937199.

It is not a de Polignac number, because 9917397 - 2³ = 9917389 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9917399) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8179 + ... + 9312.

Almost surely, 2^9917397 is an apocalyptic number.

It is an amenable number.

9917397 is a deficient number, since it is larger than the sum of its proper divisors (7014859).

9917397 is a wasteful number, since it uses less digits than its factorization.

9917397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17510 (or 17501 counting only the distinct ones).

The product of its digits is 107163, while the sum is 45.

The square root of 9917397 is about 3149.1898958304. The cubic root of 9917397 is about 214.8486188750.

The spelling of 9917397 in words is "nine million, nine hundred seventeen thousand, three hundred ninety-seven".