9999487543 has 2 divisors, whose sum is σ = 9999487544. Its totient is φ = 9999487542.

The previous prime is 9999487507. The next prime is 9999487571. The reversal of 9999487543 is 3457849999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9999487543 - 2²¹ = 9997390391 is a prime.

It is a super-2 number, since 2×9999487543² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999487243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999743771 + 4999743772.

It is an arithmetic number, because the mean of its divisors is an integer number (4999743772).

Almost surely, 2^9999487543 is an apocalyptic number.

9999487543 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999487543 is an equidigital number, since it uses as much as digits as its factorization.

9999487543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88179840, while the sum is 67.

The square root of 9999487543 is about 99997.4376821726. The cubic root of 9999487543 is about 2154.3978875653.

The spelling of 9999487543 in words is "nine billion, nine hundred ninety-nine million, four hundred eighty-seven thousand, five hundred forty-three".