720689143 has 8 divisors (see below), whose sum is σ = 770085360. Its totient is φ = 672071040.

The previous prime is 720689111. The next prime is 720689149. The reversal of 720689143 is 341986027.

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

It is a cyclic number.

It is not a de Polignac number, because 720689143 - 2⁵ = 720689111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720689096 and 720689105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720689149) 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, 192613 + ... + 196318.

It is an arithmetic number, because the mean of its divisors is an integer number (96260670).

Almost surely, 2^720689143 is an apocalyptic number.

720689143 is a deficient number, since it is larger than the sum of its proper divisors (49396217).

720689143 is a wasteful number, since it uses less digits than its factorization.

720689143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389057.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 720689143 is about 26845.6540803162. The cubic root of 720689143 is about 896.5668144884.

The spelling of 720689143 in words is "seven hundred twenty million, six hundred eighty-nine thousand, one hundred forty-three".