921443723 has 2 divisors, whose sum is σ = 921443724. Its totient is φ = 921443722.

The previous prime is 921443683. The next prime is 921443753. The reversal of 921443723 is 327344129.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 921443723 - 2¹⁰ = 921442699 is a prime.

It is a super-2 number, since 2×921443723² = 1698117069312201458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (921443753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460721861 + 460721862.

It is an arithmetic number, because the mean of its divisors is an integer number (460721862).

Almost surely, 2^921443723 is an apocalyptic number.

921443723 is a deficient number, since it is larger than the sum of its proper divisors (1).

921443723 is an equidigital number, since it uses as much as digits as its factorization.

921443723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 921443723 is about 30355.2915156485. The cubic root of 921443723 is about 973.0973099160.

The spelling of 921443723 in words is "nine hundred twenty-one million, four hundred forty-three thousand, seven hundred twenty-three".