720662911 has 2 divisors, whose sum is σ = 720662912. Its totient is φ = 720662910.

The previous prime is 720662909. The next prime is 720662923. The reversal of 720662911 is 119266027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720662911 - 2¹ = 720662909 is a prime.

Together with 720662909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720662981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360331455 + 360331456.

It is an arithmetic number, because the mean of its divisors is an integer number (360331456).

Almost surely, 2^720662911 is an apocalyptic number.

720662911 is a deficient number, since it is larger than the sum of its proper divisors (1).

720662911 is an equidigital number, since it uses as much as digits as its factorization.

720662911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 720662911 is about 26845.1655051706. The cubic root of 720662911 is about 896.5559364622. Note that the first 3 decimals are identical.

The spelling of 720662911 in words is "seven hundred twenty million, six hundred sixty-two thousand, nine hundred eleven".