127684139 has 6 divisors (see below), whose sum is σ = 139332684. Its totient is φ = 116042420.

The previous prime is 127684121. The next prime is 127684153. The reversal of 127684139 is 931486721.

It is not a de Polignac number, because 127684139 - 2²⁰ = 126635563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127684096 and 127684105.

It is not an unprimeable number, because it can be changed into a prime (127684189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35774 + ... + 39180.

It is an arithmetic number, because the mean of its divisors is an integer number (23222114).

Almost surely, 2^127684139 is an apocalyptic number.

127684139 is a deficient number, since it is larger than the sum of its proper divisors (11648545).

127684139 is an frugal number, since it uses more digits than its factorization.

127684139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6825 (or 3418 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 127684139 is about 11299.7406607408. The cubic root of 127684139 is about 503.5535369204.

The spelling of 127684139 in words is "one hundred twenty-seven million, six hundred eighty-four thousand, one hundred thirty-nine".