8720353 has 4 divisors (see below), whose sum is σ = 8748180. Its totient is φ = 8692528.

The previous prime is 8720347. The next prime is 8720389. The reversal of 8720353 is 3530278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3530278 = 2 ⋅1765139.

It can be written as a sum of positive squares in 2 ways, for example, as 471969 + 8248384 = 687^2 + 2872^2 .

It is a cyclic number.

It is not a de Polignac number, because 8720353 - 2⁵ = 8720321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8720953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13438 + ... + 14071.

It is an arithmetic number, because the mean of its divisors is an integer number (2187045).

Almost surely, 2^8720353 is an apocalyptic number.

It is an amenable number.

8720353 is a deficient number, since it is larger than the sum of its proper divisors (27827).

8720353 is a wasteful number, since it uses less digits than its factorization.

8720353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27826.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 8720353 is about 2953.0243818838. The cubic root of 8720353 is about 205.8312707026.

The spelling of 8720353 in words is "eight million, seven hundred twenty thousand, three hundred fifty-three".