8491063739 has 2 divisors, whose sum is σ = 8491063740. Its totient is φ = 8491063738.

The previous prime is 8491063673. The next prime is 8491063747. The reversal of 8491063739 is 9373601948.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8491063739 - 2²⁸ = 8222628283 is a prime.

It is not a weakly prime, because it can be changed into another prime (8491063769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245531869 + 4245531870.

It is an arithmetic number, because the mean of its divisors is an integer number (4245531870).

Almost surely, 2^8491063739 is an apocalyptic number.

8491063739 is a deficient number, since it is larger than the sum of its proper divisors (1).

8491063739 is an equidigital number, since it uses as much as digits as its factorization.

8491063739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 8491063739 is about 92146.9681487134. The cubic root of 8491063739 is about 2040.1121092913.

The spelling of 8491063739 in words is "eight billion, four hundred ninety-one million, sixty-three thousand, seven hundred thirty-nine".