8423381 has 8 divisors (see below), whose sum is σ = 8944344. Its totient is φ = 7905280.

The previous prime is 8423377. The next prime is 8423407. The reversal of 8423381 is 1833248.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2002225 + 6421156 = 1415^2 + 2534^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8423381 - 2² = 8423377 is a prime.

It is a super-2 number, since 2×8423381² = 141906694942322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 8 + 4⁵ + 2²³ + 3⁵ + 3⁶ + 8⁵ + 1 .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8423321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10511 + ... + 11283.

It is an arithmetic number, because the mean of its divisors is an integer number (1118043).

Almost surely, 2^8423381 is an apocalyptic number.

It is an amenable number.

8423381 is a deficient number, since it is larger than the sum of its proper divisors (520963).

8423381 is a wasteful number, since it uses less digits than its factorization.

8423381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431.

The product of its digits is 4608, while the sum is 29.

The square root of 8423381 is about 2902.3061520108. The cubic root of 8423381 is about 203.4677026984.

The spelling of 8423381 in words is "eight million, four hundred twenty-three thousand, three hundred eighty-one".