720238133 has 4 divisors (see below), whose sum is σ = 762605100. Its totient is φ = 677871168.

The previous prime is 720238121. The next prime is 720238213. The reversal of 720238133 is 331832027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331832027 = 17 ⋅19519531.

It can be written as a sum of positive squares in 2 ways, for example, as 231739729 + 488498404 = 15223^2 + 22102^2 .

It is a cyclic number.

It is not a de Polignac number, because 720238133 - 2⁸ = 720237877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720238096 and 720238105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720238033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21183458 + ... + 21183491.

It is an arithmetic number, because the mean of its divisors is an integer number (190651275).

Almost surely, 2^720238133 is an apocalyptic number.

It is an amenable number.

720238133 is a deficient number, since it is larger than the sum of its proper divisors (42366967).

720238133 is a wasteful number, since it uses less digits than its factorization.

720238133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42366966.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 720238133 is about 26837.2527096199. The cubic root of 720238133 is about 896.3797504898.

The spelling of 720238133 in words is "seven hundred twenty million, two hundred thirty-eight thousand, one hundred thirty-three".