689512894 has 16 divisors (see below), whose sum is σ = 1251553248. Its totient is φ = 278122752.

The previous prime is 689512861. The next prime is 689512897. The reversal of 689512894 is 498215986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689512897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1448319 + ... + 1448794.

It is an arithmetic number, because the mean of its divisors is an integer number (78222078).

Almost surely, 2^689512894 is an apocalyptic number.

689512894 is a deficient number, since it is larger than the sum of its proper divisors (562040354).

689512894 is a wasteful number, since it uses less digits than its factorization.

689512894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897139.

The product of its digits is 1244160, while the sum is 52.

The square root of 689512894 is about 26258.5775319228. The cubic root of 689512894 is about 883.4476041877.

The spelling of 689512894 in words is "six hundred eighty-nine million, five hundred twelve thousand, eight hundred ninety-four".