9391381 has 4 divisors (see below), whose sum is σ = 9405664. Its totient is φ = 9377100.

The previous prime is 9391373. The next prime is 9391387. The reversal of 9391381 is 1831939.

9391381 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.

It is a cyclic number.

It is not a de Polignac number, because 9391381 - 2³ = 9391373 is a prime.

It is a super-2 number, since 2×9391381² = 176396074174322, which contains 22 as substring.

It is a Duffinian number.

9391381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9391387) 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, 6105 + ... + 7486.

It is an arithmetic number, because the mean of its divisors is an integer number (2351416).

Almost surely, 2^9391381 is an apocalyptic number.

It is an amenable number.

9391381 is a deficient number, since it is larger than the sum of its proper divisors (14283).

9391381 is a wasteful number, since it uses less digits than its factorization.

9391381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14282.

The product of its digits is 5832, while the sum is 34.

The square root of 9391381 is about 3064.5360170832. The cubic root of 9391381 is about 210.9809061584.

The spelling of 9391381 in words is "nine million, three hundred ninety-one thousand, three hundred eighty-one".