8242487981 has 16 divisors (see below), whose sum is σ = 10380526464. Its totient is φ = 6369862464.

The previous prime is 8242487969. The next prime is 8242487999. The reversal of 8242487981 is 1897842428.

It is a de Polignac number, because none of the positive numbers 2^k-8242487981 is a prime.

It is a super-2 number, since 2×8242487981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8242487921) 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, 1049306 + ... + 1057131.

It is an arithmetic number, because the mean of its divisors is an integer number (648782904).

Almost surely, 2^8242487981 is an apocalyptic number.

It is an amenable number.

8242487981 is a deficient number, since it is larger than the sum of its proper divisors (2138038483).

8242487981 is a wasteful number, since it uses less digits than its factorization.

8242487981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106500.

The product of its digits is 2064384, while the sum is 53.

The square root of 8242487981 is about 90788.1489017151. The cubic root of 8242487981 is about 2020.0065337337.

The spelling of 8242487981 in words is "eight billion, two hundred forty-two million, four hundred eighty-seven thousand, nine hundred eighty-one".