689507039 has 4 divisors (see below), whose sum is σ = 742546056. Its totient is φ = 636468024.

The previous prime is 689506999. The next prime is 689507059. The reversal of 689507039 is 930705986.

689507039 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 is a cyclic number.

It is not a de Polignac number, because 689507039 - 2¹² = 689502943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689506984 and 689507002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689507059) 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, 26519489 + ... + 26519514.

It is an arithmetic number, because the mean of its divisors is an integer number (185636514).

Almost surely, 2^689507039 is an apocalyptic number.

689507039 is a deficient number, since it is larger than the sum of its proper divisors (53039017).

689507039 is a wasteful number, since it uses less digits than its factorization.

689507039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53039016.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 689507039 is about 26258.4660443065. The cubic root of 689507039 is about 883.4451035816.

The spelling of 689507039 in words is "six hundred eighty-nine million, five hundred seven thousand, thirty-nine".