9381381 has 4 divisors (see below), whose sum is σ = 12508512. Its totient is φ = 6254252.

The previous prime is 9381367. The next prime is 9381389. The reversal of 9381381 is 1831839.

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 9381381 - 2¹¹ = 9379333 is a prime.

It is a super-2 number, since 2×9381381² = 176020618934322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9381389) 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, 1563561 + ... + 1563566.

It is an arithmetic number, because the mean of its divisors is an integer number (3127128).

Almost surely, 2^9381381 is an apocalyptic number.

It is an amenable number.

9381381 is a deficient number, since it is larger than the sum of its proper divisors (3127131).

9381381 is a wasteful number, since it uses less digits than its factorization.

9381381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127130.

The product of its digits is 5184, while the sum is 33.

The square root of 9381381 is about 3062.9040141669. The cubic root of 9381381 is about 210.9059949765.

The spelling of 9381381 in words is "nine million, three hundred eighty-one thousand, three hundred eighty-one".