8381493 has 24 divisors (see below), whose sum is σ = 13267800. Its totient is φ = 5074944.

The previous prime is 8381467. The next prime is 8381497. The reversal of 8381493 is 3941838.

It can be written as a sum of positive squares in 4 ways, for example, as 2241009 + 6140484 = 1497^2 + 2478^2 .

It is not a de Polignac number, because 8381493 - 2⁸ = 8381237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8381497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3493 + ... + 5381.

It is an arithmetic number, because the mean of its divisors is an integer number (552825).

Almost surely, 2^8381493 is an apocalyptic number.

It is an amenable number.

8381493 is a deficient number, since it is larger than the sum of its proper divisors (4886307).

8381493 is a wasteful number, since it uses less digits than its factorization.

8381493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1938 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 8381493 is about 2895.0808278872. The cubic root of 8381493 is about 203.1298723249.

It can be divided in two parts, 8 and 381493, that added together give a triangular number (381501 = T₈₇₃).

The spelling of 8381493 in words is "eight million, three hundred eighty-one thousand, four hundred ninety-three".