127388661 has 8 divisors (see below), whose sum is σ = 173801760. Its totient is φ = 82950672.

The previous prime is 127388623. The next prime is 127388663. The reversal of 127388661 is 166883721.

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

It is not a de Polignac number, because 127388661 - 2⁷ = 127388533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127388663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493626 + ... + 493883.

It is an arithmetic number, because the mean of its divisors is an integer number (21725220).

Almost surely, 2^127388661 is an apocalyptic number.

It is an amenable number.

127388661 is a deficient number, since it is larger than the sum of its proper divisors (46413099).

127388661 is an equidigital number, since it uses as much as digits as its factorization.

127388661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987555.

The product of its digits is 96768, while the sum is 42.

The square root of 127388661 is about 11286.6585400640. The cubic root of 127388661 is about 503.1648070609.

The spelling of 127388661 in words is "one hundred twenty-seven million, three hundred eighty-eight thousand, six hundred sixty-one".