127687379 has 2 divisors, whose sum is σ = 127687380. Its totient is φ = 127687378.

The previous prime is 127687309. The next prime is 127687381. The reversal of 127687379 is 973786721.

It is a strong prime.

It is an emirp because it is prime and its reverse (973786721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127687379 - 2²⁰ = 126638803 is a prime.

It is a Sophie Germain prime.

Together with 127687381, 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 (127687309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63843689 + 63843690.

It is an arithmetic number, because the mean of its divisors is an integer number (63843690).

Almost surely, 2^127687379 is an apocalyptic number.

127687379 is a deficient number, since it is larger than the sum of its proper divisors (1).

127687379 is an equidigital number, since it uses as much as digits as its factorization.

127687379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 50.

The square root of 127687379 is about 11299.8840259535. The cubic root of 127687379 is about 503.5577961277.

The spelling of 127687379 in words is "one hundred twenty-seven million, six hundred eighty-seven thousand, three hundred seventy-nine".