689423694 has 32 divisors (see below), whose sum is σ = 1426553856. Its totient is φ = 221890560.

The previous prime is 689423671. The next prime is 689423719. The reversal of 689423694 is 496324986.

689423694 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82894 + ... + 90830.

It is an arithmetic number, because the mean of its divisors is an integer number (44579808).

Almost surely, 2^689423694 is an apocalyptic number.

689423694 is an abundant number, since it is smaller than the sum of its proper divisors (737130162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689423694 is a wasteful number, since it uses less digits than its factorization.

689423694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8440.

The product of its digits is 2239488, while the sum is 51.

The square root of 689423694 is about 26256.8789843728. The cubic root of 689423694 is about 883.4095063143.

The spelling of 689423694 in words is "six hundred eighty-nine million, four hundred twenty-three thousand, six hundred ninety-four".