1356643543 has 2 divisors, whose sum is σ = 1356643544. Its totient is φ = 1356643542.

The previous prime is 1356643511. The next prime is 1356643559. The reversal of 1356643543 is 3453466531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1356643543 - 2⁵ = 1356643511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1356643496 and 1356643505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356643573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678321771 + 678321772.

It is an arithmetic number, because the mean of its divisors is an integer number (678321772).

Almost surely, 2^1356643543 is an apocalyptic number.

1356643543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356643543 is an equidigital number, since it uses as much as digits as its factorization.

1356643543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 40.

The square root of 1356643543 is about 36832.6423570180. The cubic root of 1356643543 is about 1107.0194483121.

The spelling of 1356643543 in words is "one billion, three hundred fifty-six million, six hundred forty-three thousand, five hundred forty-three".