689578107 has 4 divisors (see below), whose sum is σ = 919437480. Its totient is φ = 459718736.

The previous prime is 689578067. The next prime is 689578121. The reversal of 689578107 is 701875986.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689578107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 689578107.

It is not an unprimeable number, because it can be changed into a prime (689578147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114929682 + ... + 114929687.

It is an arithmetic number, because the mean of its divisors is an integer number (229859370).

Almost surely, 2^689578107 is an apocalyptic number.

689578107 is a deficient number, since it is larger than the sum of its proper divisors (229859373).

689578107 is a wasteful number, since it uses less digits than its factorization.

689578107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229859372.

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 689578107 is about 26259.8192491875. The cubic root of 689578107 is about 883.4754549854.

The spelling of 689578107 in words is "six hundred eighty-nine million, five hundred seventy-eight thousand, one hundred seven".