8213897 has 2 divisors, whose sum is σ = 8213898. Its totient is φ = 8213896.

The previous prime is 8213893. The next prime is 8213951. The reversal of 8213897 is 7983128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7284601 + 929296 = 2699^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 8213897 - 2² = 8213893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8213897.

It is not a weakly prime, because it can be changed into another prime (8213893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4106948 + 4106949.

It is an arithmetic number, because the mean of its divisors is an integer number (4106949).

Almost surely, 2^8213897 is an apocalyptic number.

It is an amenable number.

8213897 is a deficient number, since it is larger than the sum of its proper divisors (1).

8213897 is an equidigital number, since it uses as much as digits as its factorization.

8213897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 8213897 is about 2865.9897068901. The cubic root of 8213897 is about 201.7668207603.

The spelling of 8213897 in words is "eight million, two hundred thirteen thousand, eight hundred ninety-seven".