8728397 has 2 divisors, whose sum is σ = 8728398. Its totient is φ = 8728396.

The previous prime is 8728387. The next prime is 8728427. The reversal of 8728397 is 7938278.

It is a happy number.

8728397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7431076 + 1297321 = 2726^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 8728397 - 2⁴ = 8728381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8728387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4364198 + 4364199.

It is an arithmetic number, because the mean of its divisors is an integer number (4364199).

Almost surely, 2^8728397 is an apocalyptic number.

It is an amenable number.

8728397 is a deficient number, since it is larger than the sum of its proper divisors (1).

8728397 is an equidigital number, since it uses as much as digits as its factorization.

8728397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 8728397 is about 2954.3860614348. The cubic root of 8728397 is about 205.8945402325.

The spelling of 8728397 in words is "eight million, seven hundred twenty-eight thousand, three hundred ninety-seven".