9691690 has 16 divisors (see below), whose sum is σ = 17512200. Its totient is φ = 3861760.

The previous prime is 9691679. The next prime is 9691697. The reversal of 9691690 is 961969.

It can be written as a sum of positive squares in 4 ways, for example, as 5377761 + 4313929 = 2319^2 + 2077^2 .

It is a super-2 number, since 2×9691690² = 187857710112200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9691697) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1086 + ... + 4534.

Almost surely, 2^9691690 is an apocalyptic number.

9691690 is a deficient number, since it is larger than the sum of its proper divisors (7820510).

9691690 is a wasteful number, since it uses less digits than its factorization.

9691690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 9691690 is about 3113.1479245291. The cubic root of 9691690 is about 213.2062040958.

The spelling of 9691690 in words is "nine million, six hundred ninety-one thousand, six hundred ninety".