680437439 has 4 divisors (see below), whose sum is σ = 742295400. Its totient is φ = 618579480.

The previous prime is 680437423. The next prime is 680437441. The reversal of 680437439 is 934734086.

It is a happy number.

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 680437439 - 2⁴ = 680437423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 680437439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680437039) 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, 30928964 + ... + 30928985.

It is an arithmetic number, because the mean of its divisors is an integer number (185573850).

Almost surely, 2^680437439 is an apocalyptic number.

680437439 is a deficient number, since it is larger than the sum of its proper divisors (61857961).

680437439 is a wasteful number, since it uses less digits than its factorization.

680437439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61857960.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 680437439 is about 26085.1957822823. The cubic root of 680437439 is about 879.5544572255.

The spelling of 680437439 in words is "six hundred eighty million, four hundred thirty-seven thousand, four hundred thirty-nine".