720707671 has 4 divisors (see below), whose sum is σ = 728805600. Its totient is φ = 712609744.

The previous prime is 720707657. The next prime is 720707693. The reversal of 720707671 is 176707027.

720707671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 720707671 - 2²⁵ = 687153239 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 720707671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720707641) 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, 4048831 + ... + 4049008.

It is an arithmetic number, because the mean of its divisors is an integer number (182201400).

Almost surely, 2^720707671 is an apocalyptic number.

720707671 is a deficient number, since it is larger than the sum of its proper divisors (8097929).

720707671 is an equidigital number, since it uses as much as digits as its factorization.

720707671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8097928.

The product of its (nonzero) digits is 28812, while the sum is 37.

The square root of 720707671 is about 26845.9991618863. Note that the first 3 decimals coincide. The cubic root of 720707671 is about 896.5744976195.

The spelling of 720707671 in words is "seven hundred twenty million, seven hundred seven thousand, six hundred seventy-one".