9731621943 has 6 divisors (see below), whose sum is σ = 14056787264. Its totient is φ = 6487747956.

The previous prime is 9731621909. The next prime is 9731621957. The reversal of 9731621943 is 3491261379.

It is not a de Polignac number, because 9731621943 - 2¹⁷ = 9731490871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9731621243) 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 5 ways as a sum of consecutive naturals, for example, 540645655 + ... + 540645672.

Almost surely, 2^9731621943 is an apocalyptic number.

9731621943 is a deficient number, since it is larger than the sum of its proper divisors (4325165321).

9731621943 is a wasteful number, since it uses less digits than its factorization.

9731621943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081291333 (or 1081291330 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 9731621943 is about 98648.9834869067. The cubic root of 9731621943 is about 2134.9862202783.

The spelling of 9731621943 in words is "nine billion, seven hundred thirty-one million, six hundred twenty-one thousand, nine hundred forty-three".