689506494 has 32 divisors (see below), whose sum is σ = 1428071040. Its totient is φ = 221676000.

The previous prime is 689506487. The next prime is 689506511. The reversal of 689506494 is 494605986.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 251109 + ... + 253839.

It is an arithmetic number, because the mean of its divisors is an integer number (44627220).

Almost surely, 2^689506494 is an apocalyptic number.

689506494 is an abundant number, since it is smaller than the sum of its proper divisors (738564546).

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

689506494 is a wasteful number, since it uses less digits than its factorization.

689506494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 689506494 is about 26258.4556666991. The cubic root of 689506494 is about 883.4448708174. Note that the first 3 decimals are identical.

The spelling of 689506494 in words is "six hundred eighty-nine million, five hundred six thousand, four hundred ninety-four".