8131847347189 has 2 divisors, whose sum is σ = 8131847347190. Its totient is φ = 8131847347188.

The previous prime is 8131847347187. The next prime is 8131847347207. The reversal of 8131847347189 is 9817437481318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5353591771089 + 2778255576100 = 2313783^2 + 1666810^2 .

It is a cyclic number.

It is not a de Polignac number, because 8131847347189 - 2¹ = 8131847347187 is a prime.

It is a super-2 number, since 2×8131847347189² (a number of 27 digits) contains 22 as substring.

Together with 8131847347187, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8131847347189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8131847347187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4065923673594 + 4065923673595.

It is an arithmetic number, because the mean of its divisors is an integer number (4065923673595).

Almost surely, 2^{8131847347189} is an apocalyptic number.

It is an amenable number.

8131847347189 is a deficient number, since it is larger than the sum of its proper divisors (1).

8131847347189 is an equidigital number, since it uses as much as digits as its factorization.

8131847347189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32514048, while the sum is 64.

The spelling of 8131847347189 in words is "eight trillion, one hundred thirty-one billion, eight hundred forty-seven million, three hundred forty-seven thousand, one hundred eighty-nine".