8367381 has 20 divisors (see below), whose sum is σ = 13637184. Its totient is φ = 5070600.

The previous prime is 8367379. The next prime is 8367389. The reversal of 8367381 is 1837638.

It is not a de Polignac number, because 8367381 - 2¹ = 8367379 is a prime.

It is a super-2 number, since 2×8367381² = 140026129598322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

8367381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8367389) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3805 + ... + 5586.

Almost surely, 2^8367381 is an apocalyptic number.

8367381 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8367381 is a deficient number, since it is larger than the sum of its proper divisors (5269803).

8367381 is a wasteful number, since it uses less digits than its factorization.

8367381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9414 (or 9405 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 8367381 is about 2892.6425634703. The cubic root of 8367381 is about 203.0158043783.

The spelling of 8367381 in words is "eight million, three hundred sixty-seven thousand, three hundred eighty-one".