720870841 has 4 divisors (see below), whose sum is σ = 720926500. Its totient is φ = 720815184.

The previous prime is 720870827. The next prime is 720870851. The reversal of 720870841 is 148078027.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 354531241 + 366339600 = 18829^2 + 19140^2 .

It is a cyclic number.

It is not a de Polignac number, because 720870841 - 2⁵ = 720870809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 720870841.

It is not an unprimeable number, because it can be changed into a prime (720870851) 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, 2935 + ... + 38083.

It is an arithmetic number, because the mean of its divisors is an integer number (180231625).

Almost surely, 2^720870841 is an apocalyptic number.

It is an amenable number.

720870841 is a deficient number, since it is larger than the sum of its proper divisors (55659).

720870841 is a wasteful number, since it uses less digits than its factorization.

720870841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55658.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 720870841 is about 26849.0379902148. The cubic root of 720870841 is about 896.6421547421.

The spelling of 720870841 in words is "seven hundred twenty million, eight hundred seventy thousand, eight hundred forty-one".