8280397 has 2 divisors, whose sum is σ = 8280398. Its totient is φ = 8280396.

The previous prime is 8280373. The next prime is 8280407. The reversal of 8280397 is 7930828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6482116 + 1798281 = 2546^2 + 1341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8280397 is a prime.

8280397 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8280367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4140198 + 4140199.

It is an arithmetic number, because the mean of its divisors is an integer number (4140199).

Almost surely, 2^8280397 is an apocalyptic number.

It is an amenable number.

8280397 is a deficient number, since it is larger than the sum of its proper divisors (1).

8280397 is an equidigital number, since it uses as much as digits as its factorization.

8280397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 8280397 is about 2877.5678966794. The cubic root of 8280397 is about 202.3098616607.

The spelling of 8280397 in words is "eight million, two hundred eighty thousand, three hundred ninety-seven".