9689641 has 4 divisors (see below), whose sum is σ = 10435012. Its totient is φ = 8944272.

The previous prime is 9689633. The next prime is 9689651. The reversal of 9689641 is 1469869.

9689641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1469869 = 43 ⋅34183.

It can be written as a sum of positive squares in 2 ways, for example, as 2903616 + 6786025 = 1704^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 9689641 - 2³ = 9689633 is a prime.

It is a Duffinian number.

9689641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9689651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372666 + ... + 372691.

It is an arithmetic number, because the mean of its divisors is an integer number (2608753).

Almost surely, 2^9689641 is an apocalyptic number.

It is an amenable number.

9689641 is a deficient number, since it is larger than the sum of its proper divisors (745371).

9689641 is a wasteful number, since it uses less digits than its factorization.

9689641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745370.

The product of its digits is 93312, while the sum is 43.

The square root of 9689641 is about 3112.8188190128. The cubic root of 9689641 is about 213.1911778103.

It can be divided in two parts, 968 and 9641, that added together give a square (10609 = 103²).

The spelling of 9689641 in words is "nine million, six hundred eighty-nine thousand, six hundred forty-one".