720253543 has 4 divisors (see below), whose sum is σ = 720490248. Its totient is φ = 720016840.

The previous prime is 720253537. The next prime is 720253571. The reversal of 720253543 is 345352027.

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 720253543 - 2²¹ = 718156391 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720253243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113728 + ... + 119893.

It is an arithmetic number, because the mean of its divisors is an integer number (180122562).

Almost surely, 2^720253543 is an apocalyptic number.

720253543 is a deficient number, since it is larger than the sum of its proper divisors (236705).

720253543 is a wasteful number, since it uses less digits than its factorization.

720253543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236704.

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 720253543 is about 26837.5398090063. The cubic root of 720253543 is about 896.3861433353.

The spelling of 720253543 in words is "seven hundred twenty million, two hundred fifty-three thousand, five hundred forty-three".