720813219 has 16 divisors (see below), whose sum is σ = 1105383168. Its totient is φ = 409267872.

The previous prime is 720813217. The next prime is 720813283. The reversal of 720813219 is 912318027.

It is not a de Polignac number, because 720813219 - 2¹ = 720813217 is a prime.

It is a super-2 number, since 2×720813219² = 1039143393370283922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 720813219.

It is not an unprimeable number, because it can be changed into a prime (720813217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106017 + ... + 112610.

It is an arithmetic number, because the mean of its divisors is an integer number (69086448).

Almost surely, 2^720813219 is an apocalyptic number.

720813219 is a deficient number, since it is larger than the sum of its proper divisors (384569949).

720813219 is a wasteful number, since it uses less digits than its factorization.

720813219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218794.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 720813219 is about 26847.9648949413. The cubic root of 720813219 is about 896.6182634114.

The spelling of 720813219 in words is "seven hundred twenty million, eight hundred thirteen thousand, two hundred nineteen".