9971690 has 16 divisors (see below), whose sum is σ = 19005192. Its totient is φ = 3753984.

The previous prime is 9971683. The next prime is 9971699. The reversal of 9971690 is 961799.

It is a happy number.

9971690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9966649 + 5041 = 3157^2 + 71^2 .

It is a super-3 number, since 3×9971690³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (9971699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29159 + ... + 29498.

Almost surely, 2^9971690 is an apocalyptic number.

9971690 is a deficient number, since it is larger than the sum of its proper divisors (9033502).

9971690 is a wasteful number, since it uses less digits than its factorization.

9971690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58681.

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

The square root of 9971690 is about 3157.7982836147. The cubic root of 9971690 is about 215.2399700268.

The spelling of 9971690 in words is "nine million, nine hundred seventy-one thousand, six hundred ninety".