689601731 has 8 divisors (see below), whose sum is σ = 848740704. Its totient is φ = 545618880.

The previous prime is 689601697. The next prime is 689601743. The reversal of 689601731 is 137106986.

689601731 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689601731 is a prime.

It is a super-2 number, since 2×689601731² = 951101094796392722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (689601791) 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, 3788930 + ... + 3789111.

It is an arithmetic number, because the mean of its divisors is an integer number (106092588).

Almost surely, 2^689601731 is an apocalyptic number.

689601731 is a deficient number, since it is larger than the sum of its proper divisors (159138973).

689601731 is a wasteful number, since it uses less digits than its factorization.

689601731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7578061.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 689601731 is about 26260.2690580276. The cubic root of 689601731 is about 883.4855437559.

The spelling of 689601731 in words is "six hundred eighty-nine million, six hundred one thousand, seven hundred thirty-one".