127889949 has 8 divisors (see below), whose sum is σ = 186021792. Its totient is φ = 77509040.

The previous prime is 127889939. The next prime is 127889981. The reversal of 127889949 is 949988721.

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 127889949 - 2⁴ = 127889933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127889939) 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, 1937694 + ... + 1937759.

It is an arithmetic number, because the mean of its divisors is an integer number (23252724).

Almost surely, 2^127889949 is an apocalyptic number.

It is an amenable number.

127889949 is a deficient number, since it is larger than the sum of its proper divisors (58131843).

127889949 is a wasteful number, since it uses less digits than its factorization.

127889949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875467.

The product of its digits is 2612736, while the sum is 57.

The square root of 127889949 is about 11308.8438401103. The cubic root of 127889949 is about 503.8239456580.

The spelling of 127889949 in words is "one hundred twenty-seven million, eight hundred eighty-nine thousand, nine hundred forty-nine".