689594005 has 4 divisors (see below), whose sum is σ = 827512812. Its totient is φ = 551675200.

The previous prime is 689593997. The next prime is 689594051. The reversal of 689594005 is 500495986.

689594005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 262634436 + 426959569 = 16206^2 + 20663^2 .

It is not a de Polignac number, because 689594005 - 2³ = 689593997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68959396 + ... + 68959405.

It is an arithmetic number, because the mean of its divisors is an integer number (206878203).

Almost surely, 2^689594005 is an apocalyptic number.

It is an amenable number.

689594005 is a deficient number, since it is larger than the sum of its proper divisors (137918807).

689594005 is a wasteful number, since it uses less digits than its factorization.

689594005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137918806.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 689594005 is about 26260.1219532583. The cubic root of 689594005 is about 883.4822443468.

The spelling of 689594005 in words is "six hundred eighty-nine million, five hundred ninety-four thousand, five".