127669 has 2 divisors, whose sum is σ = 127670. Its totient is φ = 127668.

The previous prime is 127663. The next prime is 127679. The reversal of 127669 is 966721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108900 + 18769 = 330^2 + 137^2 .

It is a cyclic number.

It is not a de Polignac number, because 127669 - 2⁵ = 127637 is a prime.

It is a super-2 number, since 2×127669² = 32598747122, which contains 22 as substring.

It is a Chen prime.

127669 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 127669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127663) 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, 63834 + 63835.

It is an arithmetic number, because the mean of its divisors is an integer number (63835).

2¹²⁷⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

127669 is a deficient number, since it is larger than the sum of its proper divisors (1).

127669 is an equidigital number, since it uses as much as digits as its factorization.

127669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 127669 is about 357.3079903948. The cubic root of 127669 is about 50.3533634688.

The spelling of 127669 in words is "one hundred twenty-seven thousand, six hundred sixty-nine".