720611 has 2 divisors, whose sum is σ = 720612. Its totient is φ = 720610.

The previous prime is 720607. The next prime is 720617. The reversal of 720611 is 116027.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (116027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720611 - 2² = 720607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720611.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720611.

It is not a weakly prime, because it can be changed into another prime (720617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360305 + 360306.

It is an arithmetic number, because the mean of its divisors is an integer number (360306).

2⁷²⁰⁶¹¹ is an apocalyptic number.

720611 is a deficient number, since it is larger than the sum of its proper divisors (1).

720611 is an equidigital number, since it uses as much as digits as its factorization.

720611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 720611 is about 848.8880962765. Note that the first 3 decimals coincide. The cubic root of 720611 is about 89.6534408953.

Adding to 720611 its reverse (116027), we get a palindrome (836638).

It can be divided in two parts, 720 and 611, that added together give a palindrome (1331).

The spelling of 720611 in words is "seven hundred twenty thousand, six hundred eleven".