8403381 has 12 divisors (see below), whose sum is σ = 13872352. Its totient is φ = 4801896.

The previous prime is 8403337. The next prime is 8403383. The reversal of 8403381 is 1833048.

8403381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8403381 - 2¹⁰ = 8402357 is a prime.

It is a super-2 number, since 2×8403381² = 141233624462322, which contains 22 as substring.

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 (8403383) 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, 66631 + ... + 66756.

Almost surely, 2^8403381 is an apocalyptic number.

It is an amenable number.

8403381 is a deficient number, since it is larger than the sum of its proper divisors (5468971).

8403381 is a wasteful number, since it uses less digits than its factorization.

8403381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133400 (or 133397 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 8403381 is about 2898.8585684714. The cubic root of 8403381 is about 203.3065410069.

The spelling of 8403381 in words is "eight million, four hundred three thousand, three hundred eighty-one".