127828849 has 2 divisors, whose sum is σ = 127828850. Its totient is φ = 127828848.

The previous prime is 127828847. The next prime is 127828907. The reversal of 127828849 is 948828721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125888400 + 1940449 = 11220^2 + 1393^2 .

It is an emirp because it is prime and its reverse (948828721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127828849 - 2¹ = 127828847 is a prime.

Together with 127828847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (127828843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63914424 + 63914425.

It is an arithmetic number, because the mean of its divisors is an integer number (63914425).

Almost surely, 2^127828849 is an apocalyptic number.

It is an amenable number.

127828849 is a deficient number, since it is larger than the sum of its proper divisors (1).

127828849 is an equidigital number, since it uses as much as digits as its factorization.

127828849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 49.

The square root of 127828849 is about 11306.1420918013. The cubic root of 127828849 is about 503.7436981563.

The spelling of 127828849 in words is "one hundred twenty-seven million, eight hundred twenty-eight thousand, eight hundred forty-nine".