1273922255989 has 2 divisors, whose sum is σ = 1273922255990. Its totient is φ = 1273922255988.

The previous prime is 1273922255987. The next prime is 1273922256073. The reversal of 1273922255989 is 9895522293721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1256248680625 + 17673575364 = 1120825^2 + 132942^2 .

It is a cyclic number.

It is not a de Polignac number, because 1273922255989 - 2¹ = 1273922255987 is a prime.

Together with 1273922255987, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1273922255989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1273922255987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636961127994 + 636961127995.

It is an arithmetic number, because the mean of its divisors is an integer number (636961127995).

Almost surely, 2^{1273922255989} is an apocalyptic number.

It is an amenable number.

1273922255989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273922255989 is an equidigital number, since it uses as much as digits as its factorization.

1273922255989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48988800, while the sum is 64.

The spelling of 1273922255989 in words is "one trillion, two hundred seventy-three billion, nine hundred twenty-two million, two hundred fifty-five thousand, nine hundred eighty-nine".