720205803 has 8 divisors (see below), whose sum is σ = 1066971600. Its totient is φ = 480137184.

The previous prime is 720205793. The next prime is 720205819. The reversal of 720205803 is 308502027.

It is not a de Polignac number, because 720205803 - 2⁵ = 720205771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 26674289 = 720205803 / (7 + 2 + 0 + 2 + 0 + 5 + 8 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (720205873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13337118 + ... + 13337171.

It is an arithmetic number, because the mean of its divisors is an integer number (133371450).

Almost surely, 2^720205803 is an apocalyptic number.

720205803 is a deficient number, since it is larger than the sum of its proper divisors (346765797).

720205803 is a wasteful number, since it uses less digits than its factorization.

720205803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26674298 (or 26674292 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 720205803 is about 26836.6503684793. The cubic root of 720205803 is about 896.3663380781.

The spelling of 720205803 in words is "seven hundred twenty million, two hundred five thousand, eight hundred three".