127680349 has 2 divisors, whose sum is σ = 127680350. Its totient is φ = 127680348.

The previous prime is 127680347. The next prime is 127680367. The reversal of 127680349 is 943086721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113103225 + 14577124 = 10635^2 + 3818^2 .

It is an emirp because it is prime and its reverse (943086721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127680349 - 2¹ = 127680347 is a prime.

Together with 127680347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127680347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63840174 + 63840175.

It is an arithmetic number, because the mean of its divisors is an integer number (63840175).

Almost surely, 2^127680349 is an apocalyptic number.

It is an amenable number.

127680349 is a deficient number, since it is larger than the sum of its proper divisors (1).

127680349 is an equidigital number, since it uses as much as digits as its factorization.

127680349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 127680349 is about 11299.5729565325. The cubic root of 127680349 is about 503.5485546081.

The spelling of 127680349 in words is "one hundred twenty-seven million, six hundred eighty thousand, three hundred forty-nine".