8216397 has 40 divisors (see below), whose sum is σ = 14396096. Its totient is φ = 4572288.

The previous prime is 8216387. The next prime is 8216407. The reversal of 8216397 is 7936128.

It is an interprime number because it is at equal distance from previous prime (8216387) and next prime (8216407).

It is not a de Polignac number, because 8216397 - 2⁷ = 8216269 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 (8216317) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 24213 + ... + 24549.

Almost surely, 2^8216397 is an apocalyptic number.

It is an amenable number.

8216397 is a deficient number, since it is larger than the sum of its proper divisors (6179699).

8216397 is a wasteful number, since it uses less digits than its factorization.

8216397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 390 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 8216397 is about 2866.4258232161. The cubic root of 8216397 is about 201.7872887503.

The spelling of 8216397 in words is "eight million, two hundred sixteen thousand, three hundred ninety-seven".