689434254 has 64 divisors (see below), whose sum is σ = 1562119680. Its totient is φ = 228165336.

The previous prime is 689434219. The next prime is 689434297. The reversal of 689434254 is 452434986.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 712479 + ... + 713445.

It is an arithmetic number, because the mean of its divisors is an integer number (24408120).

Almost surely, 2^689434254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689434254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781059840).

689434254 is an abundant number, since it is smaller than the sum of its proper divisors (872685426).

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

689434254 is an equidigital number, since it uses as much as digits as its factorization.

689434254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153 (or 1135 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 689434254 is about 26257.0800737630. The cubic root of 689434254 is about 883.4140167273.

The spelling of 689434254 in words is "six hundred eighty-nine million, four hundred thirty-four thousand, two hundred fifty-four".