127113209 has 2 divisors, whose sum is σ = 127113210. Its totient is φ = 127113208.

The previous prime is 127113193. The next prime is 127113251. The reversal of 127113209 is 902311721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127057984 + 55225 = 11272^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 127113209 - 2⁴ = 127113193 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (127113269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63556604 + 63556605.

It is an arithmetic number, because the mean of its divisors is an integer number (63556605).

Almost surely, 2^127113209 is an apocalyptic number.

It is an amenable number.

127113209 is a deficient number, since it is larger than the sum of its proper divisors (1).

127113209 is an equidigital number, since it uses as much as digits as its factorization.

127113209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 127113209 is about 11274.4493878859. The cubic root of 127113209 is about 502.8018815907.

The spelling of 127113209 in words is "one hundred twenty-seven million, one hundred thirteen thousand, two hundred nine".