689420918 has 8 divisors (see below), whose sum is σ = 1034346240. Its totient is φ = 344638840.

The previous prime is 689420917. The next prime is 689420939. The reversal of 689420918 is 819024986.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689420911) 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, 22838 + ... + 43593.

It is an arithmetic number, because the mean of its divisors is an integer number (129293280).

Almost surely, 2^689420918 is an apocalyptic number.

689420918 is a deficient number, since it is larger than the sum of its proper divisors (344925322).

689420918 is a wasteful number, since it uses less digits than its factorization.

689420918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71622.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 689420918 is about 26256.8261219821. The cubic root of 689420918 is about 883.4083206148.

The spelling of 689420918 in words is "six hundred eighty-nine million, four hundred twenty thousand, nine hundred eighteen".