127408969 has 4 divisors (see below), whose sum is σ = 128536596. Its totient is φ = 126281344.

The previous prime is 127408961. The next prime is 127408993. The reversal of 127408969 is 969804721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969804721 = 47 ⋅20634143.

It can be written as a sum of positive squares in 2 ways, for example, as 1183744 + 126225225 = 1088^2 + 11235^2 .

It is a cyclic number.

It is not a de Polignac number, because 127408969 - 2³ = 127408961 is a prime.

It is a super-2 number, since 2×127408969² = 32466090763285922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127408961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563644 + ... + 563869.

It is an arithmetic number, because the mean of its divisors is an integer number (32134149).

Almost surely, 2^127408969 is an apocalyptic number.

It is an amenable number.

127408969 is a deficient number, since it is larger than the sum of its proper divisors (1127627).

127408969 is a wasteful number, since it uses less digits than its factorization.

127408969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127626.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 127408969 is about 11287.5581504593. The cubic root of 127408969 is about 503.1915434226.

The spelling of 127408969 in words is "one hundred twenty-seven million, four hundred eight thousand, nine hundred sixty-nine".