9921446743 has 4 divisors (see below), whose sum is σ = 10684634968. Its totient is φ = 9158258520.

The previous prime is 9921446741. The next prime is 9921446747. The reversal of 9921446743 is 3476441299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3476441299 = 17 ⋅204496547.

It is a cyclic number.

It is not a de Polignac number, because 9921446743 - 2¹ = 9921446741 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 (9921446741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381594093 + ... + 381594118.

It is an arithmetic number, because the mean of its divisors is an integer number (2671158742).

Almost surely, 2^9921446743 is an apocalyptic number.

9921446743 is a deficient number, since it is larger than the sum of its proper divisors (763188225).

9921446743 is a wasteful number, since it uses less digits than its factorization.

9921446743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763188224.

The product of its digits is 1306368, while the sum is 49.

The square root of 9921446743 is about 99606.4593437594. The cubic root of 9921446743 is about 2148.7785918491.

The spelling of 9921446743 in words is "nine billion, nine hundred twenty-one million, four hundred forty-six thousand, seven hundred forty-three".