720711345 has 32 divisors (see below), whose sum is σ = 1253985408. Its totient is φ = 351986688.

The previous prime is 720711307. The next prime is 720711349. The reversal of 720711345 is 543117027.

It is not a de Polignac number, because 720711345 - 2²⁵ = 687156913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720711349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28759 + ... + 47628.

It is an arithmetic number, because the mean of its divisors is an integer number (39187044).

Almost surely, 2^720711345 is an apocalyptic number.

It is an amenable number.

720711345 is a deficient number, since it is larger than the sum of its proper divisors (533274063).

720711345 is a wasteful number, since it uses less digits than its factorization.

720711345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76449.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 720711345 is about 26846.0675891275. The cubic root of 720711345 is about 896.5760211263.

The spelling of 720711345 in words is "seven hundred twenty million, seven hundred eleven thousand, three hundred forty-five".