85577543 has 2 divisors, whose sum is σ = 85577544. Its totient is φ = 85577542.

The previous prime is 85577533. The next prime is 85577561. The reversal of 85577543 is 34577558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85577543 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85577494 and 85577503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85577533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42788771 + 42788772.

It is an arithmetic number, because the mean of its divisors is an integer number (42788772).

Almost surely, 2^85577543 is an apocalyptic number.

85577543 is a deficient number, since it is larger than the sum of its proper divisors (1).

85577543 is an equidigital number, since it uses as much as digits as its factorization.

85577543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588000, while the sum is 44.

The square root of 85577543 is about 9250.8130993983. The cubic root of 85577543 is about 440.6765470134.

The spelling of 85577543 in words is "eighty-five million, five hundred seventy-seven thousand, five hundred forty-three".