8247381 has 4 divisors (see below), whose sum is σ = 10996512. Its totient is φ = 5498252.

The previous prime is 8247377. The next prime is 8247391. The reversal of 8247381 is 1837428.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8247381 - 2² = 8247377 is a prime.

It is a super-2 number, since 2×8247381² = 136038586718322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8247341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1374561 + ... + 1374566.

It is an arithmetic number, because the mean of its divisors is an integer number (2749128).

Almost surely, 2^8247381 is an apocalyptic number.

It is an amenable number.

8247381 is a deficient number, since it is larger than the sum of its proper divisors (2749131).

8247381 is a wasteful number, since it uses less digits than its factorization.

8247381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749130.

The product of its digits is 10752, while the sum is 33.

The square root of 8247381 is about 2871.8253776997. The cubic root of 8247381 is about 202.0406169346.

The spelling of 8247381 in words is "eight million, two hundred forty-seven thousand, three hundred eighty-one".