678137679 has 12 divisors (see below), whose sum is σ = 1011130432. Its totient is φ = 437508000.

The previous prime is 678137627. The next prime is 678137687. The reversal of 678137679 is 976731876.

It is not a de Polignac number, because 678137679 - 2⁸ = 678137423 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 (678137689) 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 11 ways as a sum of consecutive naturals, for example, 1215022 + ... + 1215579.

Almost surely, 2^678137679 is an apocalyptic number.

678137679 is a deficient number, since it is larger than the sum of its proper divisors (332992753).

678137679 is a wasteful number, since it uses less digits than its factorization.

678137679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430638 (or 2430635 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 678137679 is about 26041.0767634520. The cubic root of 678137679 is about 878.5624251421.

The spelling of 678137679 in words is "six hundred seventy-eight million, one hundred thirty-seven thousand, six hundred seventy-nine".