65942543 has 2 divisors, whose sum is σ = 65942544. Its totient is φ = 65942542.

The previous prime is 65942537. The next prime is 65942561. The reversal of 65942543 is 34524956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65942543 - 2¹⁸ = 65680399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65942497 and 65942506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65942563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32971271 + 32971272.

It is an arithmetic number, because the mean of its divisors is an integer number (32971272).

Almost surely, 2^65942543 is an apocalyptic number.

65942543 is a deficient number, since it is larger than the sum of its proper divisors (1).

65942543 is an equidigital number, since it uses as much as digits as its factorization.

65942543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 38.

The square root of 65942543 is about 8120.5014007757. The cubic root of 65942543 is about 404.0066965364.

The spelling of 65942543 in words is "sixty-five million, nine hundred forty-two thousand, five hundred forty-three".