8638013771 has 2 divisors, whose sum is σ = 8638013772. Its totient is φ = 8638013770.

The previous prime is 8638013731. The next prime is 8638013779. The reversal of 8638013771 is 1773108368.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8638013771 - 2¹⁸ = 8637751627 is a prime.

It is not a weakly prime, because it can be changed into another prime (8638013779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4319006885 + 4319006886.

It is an arithmetic number, because the mean of its divisors is an integer number (4319006886).

Almost surely, 2^8638013771 is an apocalyptic number.

8638013771 is a deficient number, since it is larger than the sum of its proper divisors (1).

8638013771 is an equidigital number, since it uses as much as digits as its factorization.

8638013771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 8638013771 is about 92940.9154839783. The cubic root of 8638013771 is about 2051.8138830439.

The spelling of 8638013771 in words is "eight billion, six hundred thirty-eight million, thirteen thousand, seven hundred seventy-one".