127172657 has 2 divisors, whose sum is σ = 127172658. Its totient is φ = 127172656.

The previous prime is 127172651. The next prime is 127172687. The reversal of 127172657 is 756271721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120802081 + 6370576 = 10991^2 + 2524^2 .

It is an emirp because it is prime and its reverse (756271721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127172657 - 2⁴ = 127172641 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 127172657.

It is not a weakly prime, because it can be changed into another prime (127172651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63586328 + 63586329.

It is an arithmetic number, because the mean of its divisors is an integer number (63586329).

Almost surely, 2^127172657 is an apocalyptic number.

It is an amenable number.

127172657 is a deficient number, since it is larger than the sum of its proper divisors (1).

127172657 is an equidigital number, since it uses as much as digits as its factorization.

127172657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41160, while the sum is 38.

The square root of 127172657 is about 11277.0854834039. The cubic root of 127172657 is about 502.8802524330.

The spelling of 127172657 in words is "one hundred twenty-seven million, one hundred seventy-two thousand, six hundred fifty-seven".