716720161 has 4 divisors (see below), whose sum is σ = 716787712. Its totient is φ = 716652612.

The previous prime is 716720159. The next prime is 716720167. The reversal of 716720161 is 161027617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 716720161 - 2¹ = 716720159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (716720167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14001 + ... + 40366.

It is an arithmetic number, because the mean of its divisors is an integer number (179196928).

Almost surely, 2^716720161 is an apocalyptic number.

It is an amenable number.

716720161 is a deficient number, since it is larger than the sum of its proper divisors (67551).

716720161 is a wasteful number, since it uses less digits than its factorization.

716720161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67550.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 716720161 is about 26771.6297785548. The cubic root of 716720161 is about 894.9179251224.

Adding to 716720161 its reverse (161027617), we get a palindrome (877747778).

The spelling of 716720161 in words is "seven hundred sixteen million, seven hundred twenty thousand, one hundred sixty-one".