127438739 has 2 divisors, whose sum is σ = 127438740. Its totient is φ = 127438738.

The previous prime is 127438733. The next prime is 127438763. The reversal of 127438739 is 937834721.

It is a weak prime.

It is an emirp because it is prime and its reverse (937834721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127438739 - 2⁴ = 127438723 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127438739.

It is not a weakly prime, because it can be changed into another prime (127438733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63719369 + 63719370.

It is an arithmetic number, because the mean of its divisors is an integer number (63719370).

Almost surely, 2^127438739 is an apocalyptic number.

127438739 is a deficient number, since it is larger than the sum of its proper divisors (1).

127438739 is an equidigital number, since it uses as much as digits as its factorization.

127438739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 127438739 is about 11288.8767820364. The cubic root of 127438739 is about 503.2307317827.

The spelling of 127438739 in words is "one hundred twenty-seven million, four hundred thirty-eight thousand, seven hundred thirty-nine".