9937921543 has 12 divisors (see below), whose sum is σ = 10947464080. Its totient is φ = 9014654880.

The previous prime is 9937921541. The next prime is 9937921547. The reversal of 9937921543 is 3451297399.

It is a happy number.

It is not a de Polignac number, because 9937921543 - 2¹ = 9937921541 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9937921541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34563 + ... + 145156.

Almost surely, 2^9937921543 is an apocalyptic number.

9937921543 is a deficient number, since it is larger than the sum of its proper divisors (1009542537).

9937921543 is a wasteful number, since it uses less digits than its factorization.

9937921543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180198 (or 180187 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 52.

The square root of 9937921543 is about 99689.1244971085. The cubic root of 9937921543 is about 2149.9673002418.

The spelling of 9937921543 in words is "nine billion, nine hundred thirty-seven million, nine hundred twenty-one thousand, five hundred forty-three".