8361381 has 12 divisors (see below), whose sum is σ = 12761376. Its totient is φ = 4770360.

The previous prime is 8361377. The next prime is 8361389. The reversal of 8361381 is 1831638.

It is not a de Polignac number, because 8361381 - 2² = 8361377 is a prime.

It is a super-2 number, since 2×8361381² = 139825384454322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8361389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12936 + ... + 13566.

It is an arithmetic number, because the mean of its divisors is an integer number (1063448).

Almost surely, 2^8361381 is an apocalyptic number.

It is an amenable number.

8361381 is a deficient number, since it is larger than the sum of its proper divisors (4399995).

8361381 is an frugal number, since it uses more digits than its factorization.

8361381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272 (or 641 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 8361381 is about 2891.6052635171. The cubic root of 8361381 is about 202.9672672437.

The spelling of 8361381 in words is "eight million, three hundred sixty-one thousand, three hundred eighty-one".