678479799 has 4 divisors (see below), whose sum is σ = 904639736. Its totient is φ = 452319864.

The previous prime is 678479779. The next prime is 678479801. The reversal of 678479799 is 997974876.

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

It is not a de Polignac number, because 678479799 - 2¹⁶ = 678414263 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 (678479779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113079964 + ... + 113079969.

It is an arithmetic number, because the mean of its divisors is an integer number (226159934).

Almost surely, 2^678479799 is an apocalyptic number.

678479799 is a deficient number, since it is larger than the sum of its proper divisors (226159937).

678479799 is a wasteful number, since it uses less digits than its factorization.

678479799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226159936.

The product of its digits is 48009024, while the sum is 66.

The square root of 678479799 is about 26047.6447879650. The cubic root of 678479799 is about 878.7101450197.

The spelling of 678479799 in words is "six hundred seventy-eight million, four hundred seventy-nine thousand, seven hundred ninety-nine".