127449957839 has 2 divisors, whose sum is σ = 127449957840. Its totient is φ = 127449957838.

The previous prime is 127449957821. The next prime is 127449957851. The reversal of 127449957839 is 938759944721.

It is a strong prime.

It is an emirp because it is prime and its reverse (938759944721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127449957839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127449956839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63724978919 + 63724978920.

It is an arithmetic number, because the mean of its divisors is an integer number (63724978920).

Almost surely, 2^127449957839 is an apocalyptic number.

127449957839 is a deficient number, since it is larger than the sum of its proper divisors (1).

127449957839 is an equidigital number, since it uses as much as digits as its factorization.

127449957839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137168640, while the sum is 68.

The spelling of 127449957839 in words is "one hundred twenty-seven billion, four hundred forty-nine million, nine hundred fifty-seven thousand, eight hundred thirty-nine".