689394833 has 4 divisors (see below), whose sum is σ = 711633408. Its totient is φ = 667156260.

The previous prime is 689394821. The next prime is 689394851. The reversal of 689394833 is 338493986.

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 689394833 - 2²⁰ = 688346257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689394883) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11119241 + ... + 11119302.

It is an arithmetic number, because the mean of its divisors is an integer number (177908352).

Almost surely, 2^689394833 is an apocalyptic number.

It is an amenable number.

689394833 is a deficient number, since it is larger than the sum of its proper divisors (22238575).

689394833 is a wasteful number, since it uses less digits than its factorization.

689394833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22238574.

The product of its digits is 3359232, while the sum is 53.

The square root of 689394833 is about 26256.3293893111. The cubic root of 689394833 is about 883.3971788986.

The spelling of 689394833 in words is "six hundred eighty-nine million, three hundred ninety-four thousand, eight hundred thirty-three".