678742923 has 16 divisors (see below), whose sum is σ = 937266176. Its totient is φ = 436453920.

The previous prime is 678742919. The next prime is 678742951. The reversal of 678742923 is 329247876.

678742923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 678742923 - 2² = 678742919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678742123) 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, 16665 + ... + 40437.

It is an arithmetic number, because the mean of its divisors is an integer number (58579136).

Almost surely, 2^678742923 is an apocalyptic number.

678742923 is a deficient number, since it is larger than the sum of its proper divisors (258523253).

678742923 is a wasteful number, since it uses less digits than its factorization.

678742923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24114.

The product of its digits is 1016064, while the sum is 48.

The square root of 678742923 is about 26052.6951196992. The cubic root of 678742923 is about 878.8237223859.

The spelling of 678742923 in words is "six hundred seventy-eight million, seven hundred forty-two thousand, nine hundred twenty-three".