127449957917 has 2 divisors, whose sum is σ = 127449957918. Its totient is φ = 127449957916.

The previous prime is 127449957851. The next prime is 127449957931. The reversal of 127449957917 is 719759944721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120096209401 + 7353748516 = 346549^2 + 85754^2 .

It is a cyclic number.

It is not a de Polignac number, because 127449957917 - 2¹⁴ = 127449941533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127449957617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63724978958 + 63724978959.

It is an arithmetic number, because the mean of its divisors is an integer number (63724978959).

Almost surely, 2^127449957917 is an apocalyptic number.

It is an amenable number.

127449957917 is a deficient number, since it is larger than the sum of its proper divisors (1).

127449957917 is an equidigital number, since it uses as much as digits as its factorization.

127449957917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40007520, while the sum is 65.

The spelling of 127449957917 in words is "one hundred twenty-seven billion, four hundred forty-nine million, nine hundred fifty-seven thousand, nine hundred seventeen".