127396813 has 2 divisors, whose sum is σ = 127396814. Its totient is φ = 127396812.

The previous prime is 127396811. The next prime is 127396817. The reversal of 127396813 is 318693721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123698884 + 3697929 = 11122^2 + 1923^2 .

It is an emirp because it is prime and its reverse (318693721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127396813 - 2¹ = 127396811 is a prime.

Together with 127396811, 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 (127396811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63698406 + 63698407.

It is an arithmetic number, because the mean of its divisors is an integer number (63698407).

Almost surely, 2^127396813 is an apocalyptic number.

It is an amenable number.

127396813 is a deficient number, since it is larger than the sum of its proper divisors (1).

127396813 is an equidigital number, since it uses as much as digits as its factorization.

127396813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 127396813 is about 11287.0196686282. The cubic root of 127396813 is about 503.1755398634.

The spelling of 127396813 in words is "one hundred twenty-seven million, three hundred ninety-six thousand, eight hundred thirteen".