9723661 has 2 divisors, whose sum is σ = 9723662. Its totient is φ = 9723660.

The previous prime is 9723653. The next prime is 9723667. The reversal of 9723661 is 1663279.

9723661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9548100 + 175561 = 3090^2 + 419^2 .

It is a cyclic number.

It is not a de Polignac number, because 9723661 - 2³ = 9723653 is a prime.

It is a super-3 number, since 3×9723661³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9723667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4861830 + 4861831.

It is an arithmetic number, because the mean of its divisors is an integer number (4861831).

Almost surely, 2^9723661 is an apocalyptic number.

It is an amenable number.

9723661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9723661 is an equidigital number, since it uses as much as digits as its factorization.

9723661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 9723661 is about 3118.2785314978. The cubic root of 9723661 is about 213.4403887053.

The spelling of 9723661 in words is "nine million, seven hundred twenty-three thousand, six hundred sixty-one".