9975641 has 4 divisors (see below), whose sum is σ = 10743012. Its totient is φ = 9208272.

The previous prime is 9975631. The next prime is 9975643. The reversal of 9975641 is 1465799.

9975641 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: 1465799 = 911 ⋅1609.

It can be written as a sum of positive squares in 2 ways, for example, as 6270016 + 3705625 = 2504^2 + 1925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9975641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9975643) 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, 383666 + ... + 383691.

It is an arithmetic number, because the mean of its divisors is an integer number (2685753).

Almost surely, 2^9975641 is an apocalyptic number.

It is an amenable number.

9975641 is a deficient number, since it is larger than the sum of its proper divisors (767371).

9975641 is a wasteful number, since it uses less digits than its factorization.

9975641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767370.

The product of its digits is 68040, while the sum is 41.

The square root of 9975641 is about 3158.4238157663. The cubic root of 9975641 is about 215.2683938556.

The spelling of 9975641 in words is "nine million, nine hundred seventy-five thousand, six hundred forty-one".