85444543 has 4 divisors (see below), whose sum is σ = 87262560. Its totient is φ = 83626528.

The previous prime is 85444537. The next prime is 85444549. The reversal of 85444543 is 34544458.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (85444537) and next prime (85444549).

It is a cyclic number.

It is not a de Polignac number, because 85444543 - 2²¹ = 83347391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85444549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908938 + ... + 909031.

It is an arithmetic number, because the mean of its divisors is an integer number (21815640).

Almost surely, 2^85444543 is an apocalyptic number.

85444543 is a deficient number, since it is larger than the sum of its proper divisors (1818017).

85444543 is a wasteful number, since it uses less digits than its factorization.

85444543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818016.

The product of its digits is 153600, while the sum is 37.

The square root of 85444543 is about 9243.6217469128. The cubic root of 85444543 is about 440.4481367407.

The spelling of 85444543 in words is "eighty-five million, four hundred forty-four thousand, five hundred forty-three".