8502721919 has 16 divisors (see below), whose sum is σ = 8806132608. Its totient is φ = 8205069312.

The previous prime is 8502721861. The next prime is 8502721963. The reversal of 8502721919 is 9191272058.

It is a happy number.

8502721919 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 8502721919 - 2¹² = 8502717823 is a prime.

It is a super-2 number, since 2×8502721919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8502721919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8502721319) 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, 1259477 + ... + 1266209.

It is an arithmetic number, because the mean of its divisors is an integer number (550383288).

Almost surely, 2^8502721919 is an apocalyptic number.

8502721919 is a deficient number, since it is larger than the sum of its proper divisors (303410689).

8502721919 is a wasteful number, since it uses less digits than its factorization.

8502721919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7154.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 8502721919 is about 92210.2050697210. The cubic root of 8502721919 is about 2041.0453695643.

The spelling of 8502721919 in words is "eight billion, five hundred two million, seven hundred twenty-one thousand, nine hundred nineteen".