689163455 has 4 divisors (see below), whose sum is σ = 826996152. Its totient is φ = 551330760.

The previous prime is 689163427. The next prime is 689163499. The reversal of 689163455 is 554361986.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 689163455 - 2¹⁰ = 689162431 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 68916341 + ... + 68916350.

It is an arithmetic number, because the mean of its divisors is an integer number (206749038).

Almost surely, 2^689163455 is an apocalyptic number.

689163455 is a deficient number, since it is larger than the sum of its proper divisors (137832697).

689163455 is a wasteful number, since it uses less digits than its factorization.

689163455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137832696.

The product of its digits is 777600, while the sum is 47.

The square root of 689163455 is about 26251.9228819529. The cubic root of 689163455 is about 883.2983378407.

The spelling of 689163455 in words is "six hundred eighty-nine million, one hundred sixty-three thousand, four hundred fifty-five".