127875749 has 2 divisors, whose sum is σ = 127875750. Its totient is φ = 127875748.

The previous prime is 127875743. The next prime is 127875763. The reversal of 127875749 is 947578721.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119202724 + 8673025 = 10918^2 + 2945^2 .

It is a cyclic number.

It is not a de Polignac number, because 127875749 - 2⁴ = 127875733 is a prime.

It is a super-2 number, since 2×127875749² = 32704414364622002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 127875697 and 127875706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127875743) 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, 63937874 + 63937875.

It is an arithmetic number, because the mean of its divisors is an integer number (63937875).

Almost surely, 2^127875749 is an apocalyptic number.

It is an amenable number.

127875749 is a deficient number, since it is larger than the sum of its proper divisors (1).

127875749 is an equidigital number, since it uses as much as digits as its factorization.

127875749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 50.

The square root of 127875749 is about 11308.2159954610. The cubic root of 127875749 is about 503.8052979460.

The spelling of 127875749 in words is "one hundred twenty-seven million, eight hundred seventy-five thousand, seven hundred forty-nine".