921293543 has 6 divisors (see below), whose sum is σ = 961501704. Its totient is φ = 881098064.

The previous prime is 921293521. The next prime is 921293573. The reversal of 921293543 is 345392129.

It is a happy number.

It is not a de Polignac number, because 921293543 - 2¹⁸ = 921031399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 921293497 and 921293506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921293573) 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 5 ways as a sum of consecutive naturals, for example, 142403 + ... + 148731.

It is an arithmetic number, because the mean of its divisors is an integer number (160250284).

Almost surely, 2^921293543 is an apocalyptic number.

921293543 is a deficient number, since it is larger than the sum of its proper divisors (40208161).

921293543 is an frugal number, since it uses more digits than its factorization.

921293543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12681 (or 6352 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 921293543 is about 30352.8177110462. The cubic root of 921293543 is about 973.0444408185.

The spelling of 921293543 in words is "nine hundred twenty-one million, two hundred ninety-three thousand, five hundred forty-three".