127187057689 has 2 divisors, whose sum is σ = 127187057690. Its totient is φ = 127187057688.

The previous prime is 127187057663. The next prime is 127187057773. The reversal of 127187057689 is 986750781721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124242150400 + 2944907289 = 352480^2 + 54267^2 .

It is a cyclic number.

It is not a de Polignac number, because 127187057689 - 2²⁷ = 127052839961 is a prime.

It is not a weakly prime, because it can be changed into another prime (127187057089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63593528844 + 63593528845.

It is an arithmetic number, because the mean of its divisors is an integer number (63593528845).

Almost surely, 2^127187057689 is an apocalyptic number.

It is an amenable number.

127187057689 is a deficient number, since it is larger than the sum of its proper divisors (1).

127187057689 is an equidigital number, since it uses as much as digits as its factorization.

127187057689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11854080, while the sum is 61.

The spelling of 127187057689 in words is "one hundred twenty-seven billion, one hundred eighty-seven million, fifty-seven thousand, six hundred eighty-nine".