9943697 has 4 divisors (see below), whose sum is σ = 9975780. Its totient is φ = 9911616.

The previous prime is 9943693. The next prime is 9943699. The reversal of 9943697 is 7963499.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 919681 + 9024016 = 959^2 + 3004^2 .

It is a cyclic number.

It is not a de Polignac number, because 9943697 - 2² = 9943693 is a prime.

It is a super-2 number, since 2×9943697² = 197754220055618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9943693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15572 + ... + 16197.

It is an arithmetic number, because the mean of its divisors is an integer number (2493945).

Almost surely, 2^9943697 is an apocalyptic number.

It is an amenable number.

9943697 is a deficient number, since it is larger than the sum of its proper divisors (32083).

9943697 is a wasteful number, since it uses less digits than its factorization.

9943697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32082.

The product of its digits is 367416, while the sum is 47.

The square root of 9943697 is about 3153.3628081780. The cubic root of 9943697 is about 215.0383706530.

The spelling of 9943697 in words is "nine million, nine hundred forty-three thousand, six hundred ninety-seven".