8613281 has 2 divisors, whose sum is σ = 8613282. Its totient is φ = 8613280.

The previous prime is 8613229. The next prime is 8613299. The reversal of 8613281 is 1823168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6974881 + 1638400 = 2641^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 8613281 - 2¹⁴ = 8596897 is a prime.

It is a super-2 number, since 2×8613281² = 148377219169922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8613211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4306640 + 4306641.

It is an arithmetic number, because the mean of its divisors is an integer number (4306641).

Almost surely, 2^8613281 is an apocalyptic number.

8613281 is the 1313-rd centered decagonal number.

It is an amenable number.

8613281 is a deficient number, since it is larger than the sum of its proper divisors (1).

8613281 is an equidigital number, since it uses as much as digits as its factorization.

8613281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 8613281 is about 2934.8391778767. The cubic root of 8613281 is about 204.9853727418.

The spelling of 8613281 in words is "eight million, six hundred thirteen thousand, two hundred eighty-one".