689899173 has 4 divisors (see below), whose sum is σ = 919865568. Its totient is φ = 459932780.

The previous prime is 689899163. The next prime is 689899187. The reversal of 689899173 is 371998986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 689899173 - 2⁴ = 689899157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689899163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114983193 + ... + 114983198.

It is an arithmetic number, because the mean of its divisors is an integer number (229966392).

Almost surely, 2^689899173 is an apocalyptic number.

It is an amenable number.

689899173 is a deficient number, since it is larger than the sum of its proper divisors (229966395).

689899173 is a wasteful number, since it uses less digits than its factorization.

689899173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229966394.

The product of its digits is 5878656, while the sum is 60.

The square root of 689899173 is about 26265.9317938656. The cubic root of 689899173 is about 883.6125484324.

The spelling of 689899173 in words is "six hundred eighty-nine million, eight hundred ninety-nine thousand, one hundred seventy-three".