689609339 has 4 divisors (see below), whose sum is σ = 689681760. Its totient is φ = 689536920.

The previous prime is 689609321. The next prime is 689609363. The reversal of 689609339 is 933906986.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 689609339 - 2¹² = 689605243 is a prime.

It is a super-2 number, since 2×689609339² = 951122080872033842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689659339) 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, 19292 + ... + 41849.

It is an arithmetic number, because the mean of its divisors is an integer number (172420440).

Almost surely, 2^689609339 is an apocalyptic number.

689609339 is a deficient number, since it is larger than the sum of its proper divisors (72421).

689609339 is a wasteful number, since it uses less digits than its factorization.

689609339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72420.

The product of its (nonzero) digits is 1889568, while the sum is 53.

The square root of 689609339 is about 26260.4139152451. The cubic root of 689609339 is about 883.4887927488.

The spelling of 689609339 in words is "six hundred eighty-nine million, six hundred nine thousand, three hundred thirty-nine".