8213997 has 8 divisors (see below), whose sum is σ = 11947680. Its totient is φ = 4978160.

The previous prime is 8213987. The next prime is 8214007. The reversal of 8213997 is 7993128.

It is an interprime number because it is at equal distance from previous prime (8213987) and next prime (8214007).

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

It is not a de Polignac number, because 8213997 - 2⁷ = 8213869 is a prime.

It is a super-3 number, since 3×8213997³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8213987) 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, 124422 + ... + 124487.

It is an arithmetic number, because the mean of its divisors is an integer number (1493460).

Almost surely, 2^8213997 is an apocalyptic number.

It is an amenable number.

8213997 is a deficient number, since it is larger than the sum of its proper divisors (3733683).

8213997 is a wasteful number, since it uses less digits than its factorization.

8213997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248923.

The product of its digits is 27216, while the sum is 39.

The square root of 8213997 is about 2866.0071528173. The cubic root of 8213997 is about 201.7676395596.

The spelling of 8213997 in words is "eight million, two hundred thirteen thousand, nine hundred ninety-seven".