8720133 has 16 divisors (see below), whose sum is σ = 12517056. Its totient is φ = 5379840.

The previous prime is 8720119. The next prime is 8720137. The reversal of 8720133 is 3310278.

It is not a de Polignac number, because 8720133 - 2¹⁸ = 8457989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1710 + ... + 4512.

It is an arithmetic number, because the mean of its divisors is an integer number (782316).

Almost surely, 2^8720133 is an apocalyptic number.

It is an amenable number.

8720133 is a deficient number, since it is larger than the sum of its proper divisors (3796923).

8720133 is a wasteful number, since it uses less digits than its factorization.

8720133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 8720133 is about 2952.9871317024. The cubic root of 8720133 is about 205.8295397612.

It can be divided in two parts, 87 and 20133, that multiplied together give a palindrome (1751571).

The spelling of 8720133 in words is "eight million, seven hundred twenty thousand, one hundred thirty-three".