127681137 has 8 divisors (see below), whose sum is σ = 189157280. Its totient is φ = 85120740.

The previous prime is 127681129. The next prime is 127681139. The reversal of 127681137 is 731186721.

It is not a de Polignac number, because 127681137 - 2³ = 127681129 is a prime.

It is a super-2 number, since 2×127681137² = 32604945491225538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127681139) 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 7 ways as a sum of consecutive naturals, for example, 2364439 + ... + 2364492.

It is an arithmetic number, because the mean of its divisors is an integer number (23644660).

Almost surely, 2^127681137 is an apocalyptic number.

It is an amenable number.

127681137 is a deficient number, since it is larger than the sum of its proper divisors (61476143).

127681137 is an equidigital number, since it uses as much as digits as its factorization.

127681137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728940 (or 4728934 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 127681137 is about 11299.6078250530. The cubic root of 127681137 is about 503.5495905165.

The spelling of 127681137 in words is "one hundred twenty-seven million, six hundred eighty-one thousand, one hundred thirty-seven".