8291381 has 4 divisors (see below), whose sum is σ = 9475872. Its totient is φ = 7106892.

The previous prime is 8291357. The next prime is 8291399. The reversal of 8291381 is 1831928.

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 8291381 - 2¹⁴ = 8274997 is a prime.

It is a super-2 number, since 2×8291381² = 137493997774322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8291341) 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, 592235 + ... + 592248.

It is an arithmetic number, because the mean of its divisors is an integer number (2368968).

Almost surely, 2^8291381 is an apocalyptic number.

It is an amenable number.

8291381 is a deficient number, since it is larger than the sum of its proper divisors (1184491).

8291381 is a wasteful number, since it uses less digits than its factorization.

8291381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184490.

The product of its digits is 3456, while the sum is 32.

The square root of 8291381 is about 2879.4758203534. The cubic root of 8291381 is about 202.3992772475.

The spelling of 8291381 in words is "eight million, two hundred ninety-one thousand, three hundred eighty-one".