8481247989 has 4 divisors (see below), whose sum is σ = 11308330656. Its totient is φ = 5654165324.

The previous prime is 8481247979. The next prime is 8481247993. The reversal of 8481247989 is 9897421848.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8481247989 - 2¹⁶ = 8481182453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8481247919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1413541329 + ... + 1413541334.

It is an arithmetic number, because the mean of its divisors is an integer number (2827082664).

Almost surely, 2^8481247989 is an apocalyptic number.

It is an amenable number.

8481247989 is a deficient number, since it is larger than the sum of its proper divisors (2827082667).

8481247989 is a wasteful number, since it uses less digits than its factorization.

8481247989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827082666.

The product of its digits is 9289728, while the sum is 60.

The square root of 8481247989 is about 92093.6913637411. The cubic root of 8481247989 is about 2039.3256765401.

The spelling of 8481247989 in words is "eight billion, four hundred eighty-one million, two hundred forty-seven thousand, nine hundred eighty-nine".