127638137 has 8 divisors (see below), whose sum is σ = 139380480. Its totient is φ = 115918960.

The previous prime is 127638131. The next prime is 127638209. The reversal of 127638137 is 731836721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127638137 - 2¹⁰ = 127637113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127638137.

It is not an unprimeable number, because it can be changed into a prime (127638131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6968 + ... + 17430.

It is an arithmetic number, because the mean of its divisors is an integer number (17422560).

Almost surely, 2^127638137 is an apocalyptic number.

It is an amenable number.

127638137 is a deficient number, since it is larger than the sum of its proper divisors (11742343).

127638137 is a wasteful number, since it uses less digits than its factorization.

127638137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11583.

The product of its digits is 42336, while the sum is 38.

The square root of 127638137 is about 11297.7049439256. The cubic root of 127638137 is about 503.4930562884.

The spelling of 127638137 in words is "one hundred twenty-seven million, six hundred thirty-eight thousand, one hundred thirty-seven".