8687844742 has 4 divisors (see below), whose sum is σ = 13031767116. Its totient is φ = 4343922370.

The previous prime is 8687844707. The next prime is 8687844749. The reversal of 8687844742 is 2474487868.

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

It is a super-2 number, since 2×8687844742² (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 (8687844749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2171961184 + ... + 2171961187.

It is an arithmetic number, because the mean of its divisors is an integer number (3257941779).

Almost surely, 2^8687844742 is an apocalyptic number.

8687844742 is a deficient number, since it is larger than the sum of its proper divisors (4343922374).

8687844742 is a wasteful number, since it uses less digits than its factorization.

8687844742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343922373.

The product of its digits is 19267584, while the sum is 58.

The square root of 8687844742 is about 93208.6087333139. The cubic root of 8687844742 is about 2055.7518214154.

The spelling of 8687844742 in words is "eight billion, six hundred eighty-seven million, eight hundred forty-four thousand, seven hundred forty-two".