127939849 has 2 divisors, whose sum is σ = 127939850. Its totient is φ = 127939848.

The previous prime is 127939829. The next prime is 127939853. The reversal of 127939849 is 948939721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112784400 + 15155449 = 10620^2 + 3893^2 .

It is a cyclic number.

It is not a de Polignac number, because 127939849 - 2⁵ = 127939817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 127939796 and 127939805.

It is not a weakly prime, because it can be changed into another prime (127939829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63969924 + 63969925.

It is an arithmetic number, because the mean of its divisors is an integer number (63969925).

Almost surely, 2^127939849 is an apocalyptic number.

It is an amenable number.

127939849 is a deficient number, since it is larger than the sum of its proper divisors (1).

127939849 is an equidigital number, since it uses as much as digits as its factorization.

127939849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 52.

The square root of 127939849 is about 11311.0498628553. The cubic root of 127939849 is about 503.8894643481.

The spelling of 127939849 in words is "one hundred twenty-seven million, nine hundred thirty-nine thousand, eight hundred forty-nine".