9791381 has 4 divisors (see below), whose sum is σ = 10107264. Its totient is φ = 9475500.

The previous prime is 9791363. The next prime is 9791387. The reversal of 9791381 is 1831979.

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 9791381 - 2⁶ = 9791317 is a prime.

It is a super-2 number, since 2×9791381² = 191742283774322, 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 (9791387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157895 + ... + 157956.

It is an arithmetic number, because the mean of its divisors is an integer number (2526816).

Almost surely, 2^9791381 is an apocalyptic number.

It is an amenable number.

9791381 is a deficient number, since it is larger than the sum of its proper divisors (315883).

9791381 is a wasteful number, since it uses less digits than its factorization.

9791381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315882.

The product of its digits is 13608, while the sum is 38.

The square root of 9791381 is about 3129.1182464074. The cubic root of 9791381 is about 213.9347415073.

The spelling of 9791381 in words is "nine million, seven hundred ninety-one thousand, three hundred eighty-one".