8619281849 has 2 divisors, whose sum is σ = 8619281850. Its totient is φ = 8619281848.

The previous prime is 8619281833. The next prime is 8619281897. The reversal of 8619281849 is 9481829168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8100900025 + 518381824 = 90005^2 + 22768^2 .

It is a cyclic number.

It is not a de Polignac number, because 8619281849 - 2⁴ = 8619281833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8619281794 and 8619281803.

It is not a weakly prime, because it can be changed into another prime (8619281549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4309640924 + 4309640925.

It is an arithmetic number, because the mean of its divisors is an integer number (4309640925).

Almost surely, 2^8619281849 is an apocalyptic number.

It is an amenable number.

8619281849 is a deficient number, since it is larger than the sum of its proper divisors (1).

8619281849 is an equidigital number, since it uses as much as digits as its factorization.

8619281849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 56.

The square root of 8619281849 is about 92840.0875107300. The cubic root of 8619281849 is about 2050.3296593782.

The spelling of 8619281849 in words is "eight billion, six hundred nineteen million, two hundred eighty-one thousand, eight hundred forty-nine".