720385171 has 8 divisors (see below), whose sum is σ = 827236800. Its totient is φ = 620427240.

The previous prime is 720385151. The next prime is 720385177. The reversal of 720385171 is 171583027.

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 720385171 - 2¹¹ = 720383123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720385177) 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, 1723201 + ... + 1723618.

It is an arithmetic number, because the mean of its divisors is an integer number (103404600).

Almost surely, 2^720385171 is an apocalyptic number.

720385171 is a deficient number, since it is larger than the sum of its proper divisors (106851629).

720385171 is a wasteful number, since it uses less digits than its factorization.

720385171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446849.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 720385171 is about 26839.9920081955. The cubic root of 720385171 is about 896.4407455559.

The spelling of 720385171 in words is "seven hundred twenty million, three hundred eighty-five thousand, one hundred seventy-one".