127009913 has 2 divisors, whose sum is σ = 127009914. Its totient is φ = 127009912.

The previous prime is 127009903. The next prime is 127009943. The reversal of 127009913 is 319900721.

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., 120187369 + 6822544 = 10963^2 + 2612^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127009913 is a prime.

It is a super-2 number, since 2×127009913² = 32263036000535138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 127009913.

It is not a weakly prime, because it can be changed into another prime (127009903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63504956 + 63504957.

It is an arithmetic number, because the mean of its divisors is an integer number (63504957).

Almost surely, 2^127009913 is an apocalyptic number.

It is an amenable number.

127009913 is a deficient number, since it is larger than the sum of its proper divisors (1).

127009913 is an equidigital number, since it uses as much as digits as its factorization.

127009913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 127009913 is about 11269.8674792564. The cubic root of 127009913 is about 502.6656473930.

The spelling of 127009913 in words is "one hundred twenty-seven million, nine thousand, nine hundred thirteen".