127697978 has 16 divisors (see below), whose sum is σ = 201942720. Its totient is φ = 60441216.

The previous prime is 127697963. The next prime is 127697981. The reversal of 127697978 is 879796721.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9848 + ... + 18771.

It is an arithmetic number, because the mean of its divisors is an integer number (12621420).

Almost surely, 2^127697978 is an apocalyptic number.

127697978 is a deficient number, since it is larger than the sum of its proper divisors (74244742).

127697978 is a wasteful number, since it uses less digits than its factorization.

127697978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28741.

The product of its digits is 2667168, while the sum is 56.

The square root of 127697978 is about 11300.3530033358. The cubic root of 127697978 is about 503.5717287535.

The spelling of 127697978 in words is "one hundred twenty-seven million, six hundred ninety-seven thousand, nine hundred seventy-eight".