39927348689 has 2 divisors, whose sum is σ = 39927348690. Its totient is φ = 39927348688.

The previous prime is 39927348677. The next prime is 39927348691. The reversal of 39927348689 is 98684372993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39197268289 + 730080400 = 197983^2 + 27020^2 .

It is an emirp because it is prime and its reverse (98684372993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39927348689 is a prime.

Together with 39927348691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39927348649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19963674344 + 19963674345.

It is an arithmetic number, because the mean of its divisors is an integer number (19963674345).

Almost surely, 2^39927348689 is an apocalyptic number.

It is an amenable number.

39927348689 is a deficient number, since it is larger than the sum of its proper divisors (1).

39927348689 is an equidigital number, since it uses as much as digits as its factorization.

39927348689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141087744, while the sum is 68.

The spelling of 39927348689 in words is "thirty-nine billion, nine hundred twenty-seven million, three hundred forty-eight thousand, six hundred eighty-nine".