127219452389 has 2 divisors, whose sum is σ = 127219452390. Its totient is φ = 127219452388.

The previous prime is 127219452377. The next prime is 127219452391. The reversal of 127219452389 is 983254912721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118347696289 + 8871756100 = 344017^2 + 94190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127219452389 is a prime.

It is a Sophie Germain prime.

Together with 127219452391, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 127219452389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127219452589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63609726194 + 63609726195.

It is an arithmetic number, because the mean of its divisors is an integer number (63609726195).

Almost surely, 2^127219452389 is an apocalyptic number.

It is an amenable number.

127219452389 is a deficient number, since it is larger than the sum of its proper divisors (1).

127219452389 is an equidigital number, since it uses as much as digits as its factorization.

127219452389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The spelling of 127219452389 in words is "one hundred twenty-seven billion, two hundred nineteen million, four hundred fifty-two thousand, three hundred eighty-nine".