720213073 has 4 divisors (see below), whose sum is σ = 724982848. Its totient is φ = 715443300.

The previous prime is 720213017. The next prime is 720213077. The reversal of 720213073 is 370312027.

720213073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 720213073 - 2²⁵ = 686658641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720213077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2384661 + ... + 2384962.

It is an arithmetic number, because the mean of its divisors is an integer number (181245712).

Almost surely, 2^720213073 is an apocalyptic number.

It is an amenable number.

720213073 is a deficient number, since it is larger than the sum of its proper divisors (4769775).

720213073 is a wasteful number, since it uses less digits than its factorization.

720213073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4769774.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 720213073 is about 26836.7858172323. The cubic root of 720213073 is about 896.3693541426.

The spelling of 720213073 in words is "seven hundred twenty million, two hundred thirteen thousand, seventy-three".