8720530447123 has 12 divisors (see below), whose sum is σ = 10002131942544. Its totient is φ = 7583069951600.

The previous prime is 8720530447117. The next prime is 8720530447127. The reversal of 8720530447123 is 3217440350278.

It is not a de Polignac number, because 8720530447123 - 2¹⁷ = 8720530316051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8720530447127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1566747208 + ... + 1566752773.

It is an arithmetic number, because the mean of its divisors is an integer number (833510995212).

Almost surely, 2^{8720530447123} is an apocalyptic number.

8720530447123 is a deficient number, since it is larger than the sum of its proper divisors (1281601495421).

8720530447123 is a wasteful number, since it uses less digits than its factorization.

8720530447123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133500026 (or 3133500015 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 8720530447123 in words is "eight trillion, seven hundred twenty billion, five hundred thirty million, four hundred forty-seven thousand, one hundred twenty-three".