9957841 has 4 divisors (see below), whose sum is σ = 9979632. Its totient is φ = 9936052.

The previous prime is 9957769. The next prime is 9957863. The reversal of 9957841 is 1487599.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9957841 - 2¹⁷ = 9826769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9951841) 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, 10195 + ... + 11128.

It is an arithmetic number, because the mean of its divisors is an integer number (2494908).

Almost surely, 2^9957841 is an apocalyptic number.

It is an amenable number.

9957841 is a deficient number, since it is larger than the sum of its proper divisors (21791).

9957841 is a wasteful number, since it uses less digits than its factorization.

9957841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21790.

The product of its digits is 90720, while the sum is 43.

The square root of 9957841 is about 3155.6046964092. The cubic root of 9957841 is about 215.1402798244.

It can be divided in two parts, 995 and 7841, that added together give a square (8836 = 94²).

The spelling of 9957841 in words is "nine million, nine hundred fifty-seven thousand, eight hundred forty-one".