127055813 has 2 divisors, whose sum is σ = 127055814. Its totient is φ = 127055812.

The previous prime is 127055809. The next prime is 127055821. The reversal of 127055813 is 318550721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111555844 + 15499969 = 10562^2 + 3937^2 .

It is an emirp because it is prime and its reverse (318550721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127055813 - 2² = 127055809 is a prime.

It is a super-2 number, since 2×127055813² = 32286359234181938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 127055813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127055833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63527906 + 63527907.

It is an arithmetic number, because the mean of its divisors is an integer number (63527907).

Almost surely, 2^127055813 is an apocalyptic number.

It is an amenable number.

127055813 is a deficient number, since it is larger than the sum of its proper divisors (1).

127055813 is an equidigital number, since it uses as much as digits as its factorization.

127055813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 127055813 is about 11271.9036990209. The cubic root of 127055813 is about 502.7261927312.

The spelling of 127055813 in words is "one hundred twenty-seven million, fifty-five thousand, eight hundred thirteen".