689240237 has 8 divisors (see below), whose sum is σ = 787872000. Its totient is φ = 590650704.

The previous prime is 689240213. The next prime is 689240269. The reversal of 689240237 is 732042986.

It is a happy number.

689240237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 689240237 - 2⁸ = 689239981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 689240194 and 689240203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689240137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41639 + ... + 55787.

It is an arithmetic number, because the mean of its divisors is an integer number (98484000).

Almost surely, 2^689240237 is an apocalyptic number.

It is an amenable number.

689240237 is a deficient number, since it is larger than the sum of its proper divisors (98631763).

689240237 is a wasteful number, since it uses less digits than its factorization.

689240237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21115.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 689240237 is about 26253.3852483827. The cubic root of 689240237 is about 883.3311403608.

The spelling of 689240237 in words is "six hundred eighty-nine million, two hundred forty thousand, two hundred thirty-seven".