8381997 has 24 divisors (see below), whose sum is σ = 13465088. Its totient is φ = 4989600.

The previous prime is 8381993. The next prime is 8382007. The reversal of 8381997 is 7991838.

It is not a de Polignac number, because 8381997 - 2² = 8381993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8381993) 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, 2472 + ... + 4782.

Almost surely, 2^8381997 is an apocalyptic number.

It is an amenable number.

8381997 is a deficient number, since it is larger than the sum of its proper divisors (5083091).

8381997 is a wasteful number, since it uses less digits than its factorization.

8381997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361 (or 2358 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 8381997 is about 2895.1678707806. The cubic root of 8381997 is about 203.1339438113.

The spelling of 8381997 in words is "eight million, three hundred eighty-one thousand, nine hundred ninety-seven".