127796909 has 2 divisors, whose sum is σ = 127796910. Its totient is φ = 127796908.

The previous prime is 127796873. The next prime is 127796923. The reversal of 127796909 is 909697721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80048809 + 47748100 = 8947^2 + 6910^2 .

It is a cyclic number.

It is not a de Polignac number, because 127796909 - 2⁸ = 127796653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127796309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63898454 + 63898455.

It is an arithmetic number, because the mean of its divisors is an integer number (63898455).

Almost surely, 2^127796909 is an apocalyptic number.

It is an amenable number.

127796909 is a deficient number, since it is larger than the sum of its proper divisors (1).

127796909 is an equidigital number, since it uses as much as digits as its factorization.

127796909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 428652, while the sum is 50.

The square root of 127796909 is about 11304.7294969849. The cubic root of 127796909 is about 503.7017386297.

The spelling of 127796909 in words is "one hundred twenty-seven million, seven hundred ninety-six thousand, nine hundred nine".