678944607 has 16 divisors (see below), whose sum is σ = 1021610880. Its totient is φ = 397292000.

The previous prime is 678944569. The next prime is 678944611. The reversal of 678944607 is 706449876.

It is a cyclic number.

It is not a de Polignac number, because 678944607 - 2¹⁰ = 678943583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 678944607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678944647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353769 + ... + 355682.

It is an arithmetic number, because the mean of its divisors is an integer number (63850680).

Almost surely, 2^678944607 is an apocalyptic number.

678944607 is a deficient number, since it is larger than the sum of its proper divisors (342666273).

678944607 is a wasteful number, since it uses less digits than its factorization.

678944607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709494.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The square root of 678944607 is about 26056.5655257941. The cubic root of 678944607 is about 878.9107593306.

The spelling of 678944607 in words is "six hundred seventy-eight million, nine hundred forty-four thousand, six hundred seven".