127539857 has 2 divisors, whose sum is σ = 127539858. Its totient is φ = 127539856.

The previous prime is 127539821. The next prime is 127539869. The reversal of 127539857 is 758935721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89889361 + 37650496 = 9481^2 + 6136^2 .

It is an emirp because it is prime and its reverse (758935721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127539857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127539817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63769928 + 63769929.

It is an arithmetic number, because the mean of its divisors is an integer number (63769929).

Almost surely, 2^127539857 is an apocalyptic number.

It is an amenable number.

127539857 is a deficient number, since it is larger than the sum of its proper divisors (1).

127539857 is an equidigital number, since it uses as much as digits as its factorization.

127539857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 47.

The square root of 127539857 is about 11293.3545503539. The cubic root of 127539857 is about 503.3637950172.

The spelling of 127539857 in words is "one hundred twenty-seven million, five hundred thirty-nine thousand, eight hundred fifty-seven".