678899249 has 8 divisors (see below), whose sum is σ = 776152320. Its totient is φ = 581713056.

The previous prime is 678899239. The next prime is 678899269. The reversal of 678899249 is 942998876.

678899249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 678899249 - 2¹⁶ = 678833713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 678899191 and 678899200.

It is not an unprimeable number, because it can be changed into a prime (678899239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7352 + ... + 37574.

It is an arithmetic number, because the mean of its divisors is an integer number (97019040).

Almost surely, 2^678899249 is an apocalyptic number.

It is an amenable number.

678899249 is a deficient number, since it is larger than the sum of its proper divisors (97253071).

678899249 is a wasteful number, since it uses less digits than its factorization.

678899249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33439.

The product of its digits is 15676416, while the sum is 62.

The square root of 678899249 is about 26055.6951356129. The cubic root of 678899249 is about 878.8911865399.

The spelling of 678899249 in words is "six hundred seventy-eight million, eight hundred ninety-nine thousand, two hundred forty-nine".