127717139 has 4 divisors (see below), whose sum is σ = 139327800. Its totient is φ = 116106480.

The previous prime is 127717127. The next prime is 127717157. The reversal of 127717139 is 931717721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127717139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127717199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5805314 + ... + 5805335.

It is an arithmetic number, because the mean of its divisors is an integer number (34831950).

Almost surely, 2^127717139 is an apocalyptic number.

127717139 is a deficient number, since it is larger than the sum of its proper divisors (11610661).

127717139 is a wasteful number, since it uses less digits than its factorization.

127717139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11610660.

The product of its digits is 18522, while the sum is 38.

The square root of 127717139 is about 11301.2007769086. The cubic root of 127717139 is about 503.5969143659.

The spelling of 127717139 in words is "one hundred twenty-seven million, seven hundred seventeen thousand, one hundred thirty-nine".