9918970 has 16 divisors (see below), whose sum is σ = 17916840. Its totient is φ = 3953664.

The previous prime is 9918959. The next prime is 9918983. The reversal of 9918970 is 798199.

It can be written as a sum of positive squares in 4 ways, for example, as 6395841 + 3523129 = 2529^2 + 1877^2 .

It is an Ulam number.

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, 1546 + ... + 4714.

Almost surely, 2^9918970 is an apocalyptic number.

9918970 is a deficient number, since it is larger than the sum of its proper divisors (7997870).

9918970 is a wasteful number, since it uses less digits than its factorization.

9918970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 9918970 is about 3149.4396326966. The cubic root of 9918970 is about 214.8599773330.

The spelling of 9918970 in words is "nine million, nine hundred eighteen thousand, nine hundred seventy".