9987547492 has 24 divisors (see below), whose sum is σ = 19331410616. Its totient is φ = 4485051648.

The previous prime is 9987547477. The next prime is 9987547511. The reversal of 9987547492 is 2947457899.

It can be written as a sum of positive squares in 4 ways, for example, as 34292736 + 9953254756 = 5856^2 + 99766^2 .

It is a super-2 number, since 2×9987547492² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2593593 + ... + 2597440.

Almost surely, 2^9987547492 is an apocalyptic number.

It is an amenable number.

9987547492 is a deficient number, since it is larger than the sum of its proper divisors (9343863124).

9987547492 is a wasteful number, since it uses less digits than its factorization.

9987547492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191087 (or 5191085 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 64.

The square root of 9987547492 is about 99937.7180648027. The cubic root of 9987547492 is about 2153.5400480707.

The spelling of 9987547492 in words is "nine billion, nine hundred eighty-seven million, five hundred forty-seven thousand, four hundred ninety-two".