921461543 has 2 divisors, whose sum is σ = 921461544. Its totient is φ = 921461542.

The previous prime is 921461539. The next prime is 921461549. The reversal of 921461543 is 345164129.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 921461543 - 2² = 921461539 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921461549) 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, 460730771 + 460730772.

It is an arithmetic number, because the mean of its divisors is an integer number (460730772).

Almost surely, 2^921461543 is an apocalyptic number.

921461543 is a deficient number, since it is larger than the sum of its proper divisors (1).

921461543 is an equidigital number, since it uses as much as digits as its factorization.

921461543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 921461543 is about 30355.5850380124. The cubic root of 921461543 is about 973.1035828555.

The spelling of 921461543 in words is "nine hundred twenty-one million, four hundred sixty-one thousand, five hundred forty-three".