43961543 has 2 divisors, whose sum is σ = 43961544. Its totient is φ = 43961542.

The previous prime is 43961527. The next prime is 43961557. The reversal of 43961543 is 34516934.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43961543 - 2⁴ = 43961527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43961443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21980771 + 21980772.

It is an arithmetic number, because the mean of its divisors is an integer number (21980772).

Almost surely, 2^43961543 is an apocalyptic number.

43961543 is a deficient number, since it is larger than the sum of its proper divisors (1).

43961543 is an equidigital number, since it uses as much as digits as its factorization.

43961543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 43961543 is about 6630.3501415838. The cubic root of 43961543 is about 352.9319500633.

The spelling of 43961543 in words is "forty-three million, nine hundred sixty-one thousand, five hundred forty-three".