8742520489 has 4 divisors (see below), whose sum is σ = 8742729556. Its totient is φ = 8742311424.

The previous prime is 8742520477. The next prime is 8742520499. The reversal of 8742520489 is 9840252478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7799539225 + 942981264 = 88315^2 + 30708^2 .

It is a cyclic number.

It is not a de Polignac number, because 8742520489 - 2¹¹ = 8742518441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8742520439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17844 + ... + 133429.

It is an arithmetic number, because the mean of its divisors is an integer number (2185682389).

Almost surely, 2^8742520489 is an apocalyptic number.

It is an amenable number.

8742520489 is a deficient number, since it is larger than the sum of its proper divisors (209067).

8742520489 is a wasteful number, since it uses less digits than its factorization.

8742520489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209066.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The square root of 8742520489 is about 93501.4464540522. The cubic root of 8742520489 is about 2060.0553358843.

The spelling of 8742520489 in words is "eight billion, seven hundred forty-two million, five hundred twenty thousand, four hundred eighty-nine".