27343197989 has 2 divisors, whose sum is σ = 27343197990. Its totient is φ = 27343197988.

The previous prime is 27343197941. The next prime is 27343197991. The reversal of 27343197989 is 98979134372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24974429089 + 2368768900 = 158033^2 + 48670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27343197989 is a prime.

Together with 27343197991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27343197689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13671598994 + 13671598995.

It is an arithmetic number, because the mean of its divisors is an integer number (13671598995).

Almost surely, 2^27343197989 is an apocalyptic number.

It is an amenable number.

27343197989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27343197989 is an equidigital number, since it uses as much as digits as its factorization.

27343197989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 62.

The spelling of 27343197989 in words is "twenty-seven billion, three hundred forty-three million, one hundred ninety-seven thousand, nine hundred eighty-nine".