127947749 has 2 divisors, whose sum is σ = 127947750. Its totient is φ = 127947748.

The previous prime is 127947731. The next prime is 127947773. The reversal of 127947749 is 947749721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127283524 + 664225 = 11282^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 127947749 - 2⁸ = 127947493 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 127947697 and 127947706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127947649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63973874 + 63973875.

It is an arithmetic number, because the mean of its divisors is an integer number (63973875).

Almost surely, 2^127947749 is an apocalyptic number.

It is an amenable number.

127947749 is a deficient number, since it is larger than the sum of its proper divisors (1).

127947749 is an equidigital number, since it uses as much as digits as its factorization.

127947749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 50.

The square root of 127947749 is about 11311.3990735010. The cubic root of 127947749 is about 503.8998354844.

The spelling of 127947749 in words is "one hundred twenty-seven million, nine hundred forty-seven thousand, seven hundred forty-nine".