8684718533 has 2 divisors, whose sum is σ = 8684718534. Its totient is φ = 8684718532.

The previous prime is 8684718473. The next prime is 8684718587. The reversal of 8684718533 is 3358174868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6422099044 + 2262619489 = 80138^2 + 47567^2 .

It is a cyclic number.

It is not a de Polignac number, because 8684718533 - 2²⁰ = 8683669957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8684718733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4342359266 + 4342359267.

It is an arithmetic number, because the mean of its divisors is an integer number (4342359267).

Almost surely, 2^8684718533 is an apocalyptic number.

It is an amenable number.

8684718533 is a deficient number, since it is larger than the sum of its proper divisors (1).

8684718533 is an equidigital number, since it uses as much as digits as its factorization.

8684718533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 53.

The square root of 8684718533 is about 93191.8372659323. The cubic root of 8684718533 is about 2055.5052132310.

The spelling of 8684718533 in words is "eight billion, six hundred eighty-four million, seven hundred eighteen thousand, five hundred thirty-three".