127640677 has 2 divisors, whose sum is σ = 127640678. Its totient is φ = 127640676.

The previous prime is 127640627. The next prime is 127640683. The reversal of 127640677 is 776046721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100922116 + 26718561 = 10046^2 + 5169^2 .

It is a cyclic number.

It is not a de Polignac number, because 127640677 - 2⁷ = 127640549 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127640627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63820338 + 63820339.

It is an arithmetic number, because the mean of its divisors is an integer number (63820339).

Almost surely, 2^127640677 is an apocalyptic number.

It is an amenable number.

127640677 is a deficient number, since it is larger than the sum of its proper divisors (1).

127640677 is an equidigital number, since it uses as much as digits as its factorization.

127640677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 127640677 is about 11297.8173555780. The cubic root of 127640677 is about 503.4963961050.

The spelling of 127640677 in words is "one hundred twenty-seven million, six hundred forty thousand, six hundred seventy-seven".