921983543 has 16 divisors (see below), whose sum is σ = 1037277696. Its totient is φ = 813114720.

The previous prime is 921983539. The next prime is 921983603. The reversal of 921983543 is 345389129.

It is a cyclic number.

It is not a de Polignac number, because 921983543 - 2² = 921983539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 921983494 and 921983503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921983533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431588 + ... + 433718.

It is an arithmetic number, because the mean of its divisors is an integer number (64829856).

Almost surely, 2^921983543 is an apocalyptic number.

921983543 is a deficient number, since it is larger than the sum of its proper divisors (115294153).

921983543 is a wasteful number, since it uses less digits than its factorization.

921983543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614.

The product of its digits is 233280, while the sum is 44.

The square root of 921983543 is about 30364.1819089532. The cubic root of 921983543 is about 973.2872997583.

The spelling of 921983543 in words is "nine hundred twenty-one million, nine hundred eighty-three thousand, five hundred forty-three".