9953681 has 4 divisors (see below), whose sum is σ = 9960000. Its totient is φ = 9947364.

The previous prime is 9953621. The next prime is 9953711. The reversal of 9953681 is 1863599.

9953681 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 a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1863599 = 83 ⋅22453.

It is a cyclic number.

It is not a de Polignac number, because 9953681 - 2¹⁴ = 9937297 is a prime.

It is a super-2 number, since 2×9953681² = 198151530899522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9953621) 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, 1340 + ... + 4658.

It is an arithmetic number, because the mean of its divisors is an integer number (2490000).

Almost surely, 2^9953681 is an apocalyptic number.

It is an amenable number.

9953681 is a deficient number, since it is larger than the sum of its proper divisors (6319).

9953681 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 9953681 = (5689391)₁₁.

9953681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6318.

The product of its digits is 58320, while the sum is 41.

The square root of 9953681 is about 3154.9454828887. The cubic root of 9953681 is about 215.1103165615.

The spelling of 9953681 in words is "nine million, nine hundred fifty-three thousand, six hundred eighty-one".