689039999 has 4 divisors (see below), whose sum is σ = 689106000. Its totient is φ = 688974000.

The previous prime is 689039983. The next prime is 689040013. The reversal of 689039999 is 999930986.

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, and also an emirpimes, since its reverse is a distinct semiprime: 999930986 = 2 ⋅499965493.

It is a cyclic number.

It is not a de Polignac number, because 689039999 - 2⁴ = 689039983 is a prime.

It is a super-2 number, since 2×689039999² = 949552240443840002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689032999) by changing a digit.

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, 13499 + ... + 39500.

It is an arithmetic number, because the mean of its divisors is an integer number (172276500).

Almost surely, 2^689039999 is an apocalyptic number.

689039999 is a deficient number, since it is larger than the sum of its proper divisors (66001).

689039999 is a wasteful number, since it uses less digits than its factorization.

689039999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66000.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The square root of 689039999 is about 26249.5714060249. The cubic root of 689039999 is about 883.2455903195.

The spelling of 689039999 in words is "six hundred eighty-nine million, thirty-nine thousand, nine hundred ninety-nine".