808561543 has 2 divisors, whose sum is σ = 808561544. Its totient is φ = 808561542.

The previous prime is 808561519. The next prime is 808561583. The reversal of 808561543 is 345165808.

It is an a-pointer prime, because the next prime (808561583) can be obtained adding 808561543 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 808561543 - 2¹³ = 808553351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 808561496 and 808561505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808561513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404280771 + 404280772.

It is an arithmetic number, because the mean of its divisors is an integer number (404280772).

Almost surely, 2^808561543 is an apocalyptic number.

808561543 is a deficient number, since it is larger than the sum of its proper divisors (1).

808561543 is an equidigital number, since it uses as much as digits as its factorization.

808561543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 808561543 is about 28435.2165984365. The cubic root of 808561543 is about 931.6176198370.

The spelling of 808561543 in words is "eight hundred eight million, five hundred sixty-one thousand, five hundred forty-three".