127681313 has 2 divisors, whose sum is σ = 127681314. Its totient is φ = 127681312.

The previous prime is 127681289. The next prime is 127681321. The reversal of 127681313 is 313186721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117332224 + 10349089 = 10832^2 + 3217^2 .

It is a cyclic number.

It is not a de Polignac number, because 127681313 - 2¹² = 127677217 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127681313.

It is not a weakly prime, because it can be changed into another prime (127681613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63840656 + 63840657.

It is an arithmetic number, because the mean of its divisors is an integer number (63840657).

Almost surely, 2^127681313 is an apocalyptic number.

It is an amenable number.

127681313 is a deficient number, since it is larger than the sum of its proper divisors (1).

127681313 is an equidigital number, since it uses as much as digits as its factorization.

127681313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 127681313 is about 11299.6156129313. The cubic root of 127681313 is about 503.5498218863.

The spelling of 127681313 in words is "one hundred twenty-seven million, six hundred eighty-one thousand, three hundred thirteen".