127139939 has 8 divisors (see below), whose sum is σ = 129665760. Its totient is φ = 124635456.

The previous prime is 127139933. The next prime is 127139977. The reversal of 127139939 is 939931721.

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 127139939 - 2¹⁶ = 127074403 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 127139939.

It is not an unprimeable number, because it can be changed into a prime (127139933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6977 + ... + 17405.

It is an arithmetic number, because the mean of its divisors is an integer number (16208220).

Almost surely, 2^127139939 is an apocalyptic number.

127139939 is a deficient number, since it is larger than the sum of its proper divisors (2525821).

127139939 is a wasteful number, since it uses less digits than its factorization.

127139939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10669.

The product of its digits is 91854, while the sum is 44.

The square root of 127139939 is about 11275.6347493168. The cubic root of 127139939 is about 502.8371230170.

The spelling of 127139939 in words is "one hundred twenty-seven million, one hundred thirty-nine thousand, nine hundred thirty-nine".