85557443 has 2 divisors, whose sum is σ = 85557444. Its totient is φ = 85557442.

The previous prime is 85557397. The next prime is 85557449. The reversal of 85557443 is 34475558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85557443 - 2¹⁶ = 85491907 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85557443.

It is not a weakly prime, because it can be changed into another prime (85557449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42778721 + 42778722.

It is an arithmetic number, because the mean of its divisors is an integer number (42778722).

Almost surely, 2^85557443 is an apocalyptic number.

85557443 is a deficient number, since it is larger than the sum of its proper divisors (1).

85557443 is an equidigital number, since it uses as much as digits as its factorization.

85557443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 41.

The square root of 85557443 is about 9249.7266446096. The cubic root of 85557443 is about 440.6420430542.

The spelling of 85557443 in words is "eighty-five million, five hundred fifty-seven thousand, four hundred forty-three".