8247397 has 8 divisors (see below), whose sum is σ = 9034200. Its totient is φ = 7494144.

The previous prime is 8247391. The next prime is 8247413. The reversal of 8247397 is 7937428.

It can be written as a sum of positive squares in 4 ways, for example, as 2869636 + 5377761 = 1694^2 + 2319^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-8247397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8247391) 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, 7872 + ... + 8857.

It is an arithmetic number, because the mean of its divisors is an integer number (1129275).

Almost surely, 2^8247397 is an apocalyptic number.

It is an amenable number.

8247397 is a deficient number, since it is larger than the sum of its proper divisors (786803).

8247397 is a wasteful number, since it uses less digits than its factorization.

8247397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16775.

The product of its digits is 84672, while the sum is 40.

The square root of 8247397 is about 2871.8281633830. The cubic root of 8247397 is about 202.0407475881.

The spelling of 8247397 in words is "eight million, two hundred forty-seven thousand, three hundred ninety-seven".