689502123 has 12 divisors (see below), whose sum is σ = 996462480. Its totient is φ = 459430416.

The previous prime is 689502113. The next prime is 689502139. The reversal of 689502123 is 321205986.

It is not a de Polignac number, because 689502123 - 2⁶ = 689502059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689502113) 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 11 ways as a sum of consecutive naturals, for example, 436 + ... + 37137.

It is an arithmetic number, because the mean of its divisors is an integer number (83038540).

Almost surely, 2^689502123 is an apocalyptic number.

689502123 is a deficient number, since it is larger than the sum of its proper divisors (306960357).

689502123 is a wasteful number, since it uses less digits than its factorization.

689502123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39618 (or 39615 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 689502123 is about 26258.3724362345. The cubic root of 689502123 is about 883.4430040012.

The spelling of 689502123 in words is "six hundred eighty-nine million, five hundred two thousand, one hundred twenty-three".