678610923 has 4 divisors (see below), whose sum is σ = 904814568. Its totient is φ = 452407280.

The previous prime is 678610921. The next prime is 678610931. The reversal of 678610923 is 329016876.

It is a happy number.

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 678610923 - 2¹ = 678610921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678610921) 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, 113101818 + ... + 113101823.

It is an arithmetic number, because the mean of its divisors is an integer number (226203642).

Almost surely, 2^678610923 is an apocalyptic number.

678610923 is a deficient number, since it is larger than the sum of its proper divisors (226203645).

678610923 is a wasteful number, since it uses less digits than its factorization.

678610923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226203644.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 678610923 is about 26050.1616693640. The cubic root of 678610923 is about 878.7667483101.

The spelling of 678610923 in words is "six hundred seventy-eight million, six hundred ten thousand, nine hundred twenty-three".