678706127 has 4 divisors (see below), whose sum is σ = 740406696. Its totient is φ = 617005560.

The previous prime is 678706123. The next prime is 678706139. The reversal of 678706127 is 721607876.

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

It is a cyclic number.

It is not a de Polignac number, because 678706127 - 2² = 678706123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678706123) 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 3 ways as a sum of consecutive naturals, for example, 30850268 + ... + 30850289.

It is an arithmetic number, because the mean of its divisors is an integer number (185101674).

Almost surely, 2^678706127 is an apocalyptic number.

678706127 is a deficient number, since it is larger than the sum of its proper divisors (61700569).

678706127 is a wasteful number, since it uses less digits than its factorization.

678706127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61700568.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 678706127 is about 26051.9889259918. The cubic root of 678706127 is about 878.8078411733.

The spelling of 678706127 in words is "six hundred seventy-eight million, seven hundred six thousand, one hundred twenty-seven".