678941799 has 4 divisors (see below), whose sum is σ = 905255736. Its totient is φ = 452627864.

The previous prime is 678941777. The next prime is 678941827. The reversal of 678941799 is 997149876.

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 678941799 - 2¹² = 678937703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678941299) 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, 113156964 + ... + 113156969.

It is an arithmetic number, because the mean of its divisors is an integer number (226313934).

Almost surely, 2^678941799 is an apocalyptic number.

678941799 is a deficient number, since it is larger than the sum of its proper divisors (226313937).

678941799 is a wasteful number, since it uses less digits than its factorization.

678941799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226313936.

The product of its digits is 6858432, while the sum is 60.

The square root of 678941799 is about 26056.5116429656. The cubic root of 678941799 is about 878.9095476536.

The spelling of 678941799 in words is "six hundred seventy-eight million, nine hundred forty-one thousand, seven hundred ninety-nine".