720872079 has 4 divisors (see below), whose sum is σ = 961162776. Its totient is φ = 480581384.

The previous prime is 720872069. The next prime is 720872093. The reversal of 720872079 is 970278027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 720872079 - 2¹⁶ = 720806543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720872079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720872059) 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, 120145344 + ... + 120145349.

It is an arithmetic number, because the mean of its divisors is an integer number (240290694).

Almost surely, 2^720872079 is an apocalyptic number.

720872079 is a deficient number, since it is larger than the sum of its proper divisors (240290697).

720872079 is a wasteful number, since it uses less digits than its factorization.

720872079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240290696.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 720872079 is about 26849.0610450347. The cubic root of 720872079 is about 896.6426680297.

The spelling of 720872079 in words is "seven hundred twenty million, eight hundred seventy-two thousand, seventy-nine".