127646749 has 2 divisors, whose sum is σ = 127646750. Its totient is φ = 127646748.

The previous prime is 127646683. The next prime is 127646791. The reversal of 127646749 is 947646721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80820100 + 46826649 = 8990^2 + 6843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127646749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 127646699 and 127646708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127646549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63823374 + 63823375.

It is an arithmetic number, because the mean of its divisors is an integer number (63823375).

Almost surely, 2^127646749 is an apocalyptic number.

It is an amenable number.

127646749 is a deficient number, since it is larger than the sum of its proper divisors (1).

127646749 is an equidigital number, since it uses as much as digits as its factorization.

127646749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 127646749 is about 11298.0860768539. The cubic root of 127646749 is about 503.5043799278.

The spelling of 127646749 in words is "one hundred twenty-seven million, six hundred forty-six thousand, seven hundred forty-nine".