689312546 has 8 divisors (see below), whose sum is σ = 1113504924. Its totient is φ = 318144240.

The previous prime is 689312527. The next prime is 689312557. The reversal of 689312546 is 645213986.

It can be written as a sum of positive squares in 2 ways, for example, as 654796921 + 34515625 = 25589^2 + 5875^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 689312497 and 689312506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13255985 + ... + 13256036.

Almost surely, 2^689312546 is an apocalyptic number.

689312546 is a deficient number, since it is larger than the sum of its proper divisors (424192378).

689312546 is a wasteful number, since it uses less digits than its factorization.

689312546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26512036.

The product of its digits is 311040, while the sum is 44.

The square root of 689312546 is about 26254.7623489530. The cubic root of 689312546 is about 883.3620297153.

The spelling of 689312546 in words is "six hundred eighty-nine million, three hundred twelve thousand, five hundred forty-six".