8981617 has 2 divisors, whose sum is σ = 8981618. Its totient is φ = 8981616.

The previous prime is 8981611. The next prime is 8981633. The reversal of 8981617 is 7161898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6305121 + 2676496 = 2511^2 + 1636^2 .

It is a cyclic number.

It is not a de Polignac number, because 8981617 - 2¹¹ = 8979569 is a prime.

8981617 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8981617.

It is not a weakly prime, because it can be changed into another prime (8981611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4490808 + 4490809.

It is an arithmetic number, because the mean of its divisors is an integer number (4490809).

Almost surely, 2^8981617 is an apocalyptic number.

It is an amenable number.

8981617 is a deficient number, since it is larger than the sum of its proper divisors (1).

8981617 is an equidigital number, since it uses as much as digits as its factorization.

8981617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 40.

The square root of 8981617 is about 2996.9346005544. The cubic root of 8981617 is about 207.8666628791.

The spelling of 8981617 in words is "eight million, nine hundred eighty-one thousand, six hundred seventeen".