9956381 has 4 divisors (see below), whose sum is σ = 9964032. Its totient is φ = 9948732.

The previous prime is 9956369. The next prime is 9956383. The reversal of 9956381 is 1836599.

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: 1836599 = 29 ⋅63331.

It is a cyclic number.

It is not a de Polignac number, because 9956381 - 2²² = 5762077 is a prime.

It is a super-2 number, since 2×9956381² = 198259045234322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9956383) 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, 1331 + ... + 4656.

It is an arithmetic number, because the mean of its divisors is an integer number (2491008).

Almost surely, 2^9956381 is an apocalyptic number.

It is an amenable number.

9956381 is a deficient number, since it is larger than the sum of its proper divisors (7651).

9956381 is a wasteful number, since it uses less digits than its factorization.

9956381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7650.

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

The square root of 9956381 is about 3155.3733535035. The cubic root of 9956381 is about 215.1297648222.

The spelling of 9956381 in words is "nine million, nine hundred fifty-six thousand, three hundred eighty-one".