8539347491 has 2 divisors, whose sum is σ = 8539347492. Its totient is φ = 8539347490.

The previous prime is 8539347473. The next prime is 8539347521. The reversal of 8539347491 is 1947439358.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8539347491 is a prime.

It is not a weakly prime, because it can be changed into another prime (8539347461) 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, 4269673745 + 4269673746.

It is an arithmetic number, because the mean of its divisors is an integer number (4269673746).

Almost surely, 2^8539347491 is an apocalyptic number.

8539347491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8539347491 is an equidigital number, since it uses as much as digits as its factorization.

8539347491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 53.

The square root of 8539347491 is about 92408.5899199853. The cubic root of 8539347491 is about 2043.9717804930.

The spelling of 8539347491 in words is "eight billion, five hundred thirty-nine million, three hundred forty-seven thousand, four hundred ninety-one".