9917970 has 32 divisors (see below), whose sum is σ = 25204608. Its totient is φ = 2489088.

The previous prime is 9917969. The next prime is 9917983. The reversal of 9917970 is 797199.

It is a super-2 number, since 2×9917970² = 196732257841800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9214 + ... + 10233.

It is an arithmetic number, because the mean of its divisors is an integer number (787644).

Almost surely, 2^9917970 is an apocalyptic number.

9917970 is an abundant number, since it is smaller than the sum of its proper divisors (15286638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9917970 is a wasteful number, since it uses less digits than its factorization.

9917970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19474.

The product of its (nonzero) digits is 35721, while the sum is 42.

The square root of 9917970 is about 3149.2808702940. The cubic root of 9917970 is about 214.8527565833.

The spelling of 9917970 in words is "nine million, nine hundred seventeen thousand, nine hundred seventy".