9917690 has 16 divisors (see below), whose sum is σ = 17968392. Its totient is φ = 3941184.

The previous prime is 9917689. The next prime is 9917701. The reversal of 9917690 is 967199.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7198489 + 2719201 = 2683^2 + 1649^2 .

It is a super-2 number, since 2×9917690² = 196721149872200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1589 + ... + 4728.

Almost surely, 2^9917690 is an apocalyptic number.

9917690 is a deficient number, since it is larger than the sum of its proper divisors (8050702).

9917690 is a wasteful number, since it uses less digits than its factorization.

9917690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6481.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 9917690 is about 3149.2364153871. The cubic root of 9917690 is about 214.8507346864.

The spelling of 9917690 in words is "nine million, nine hundred seventeen thousand, six hundred ninety".