85440893 has 2 divisors, whose sum is σ = 85440894. Its totient is φ = 85440892.

The previous prime is 85440857. The next prime is 85440899. The reversal of 85440893 is 39804458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54493924 + 30946969 = 7382^2 + 5563^2 .

It is a cyclic number.

It is not a de Polignac number, because 85440893 - 2⁶ = 85440829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85440893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85440899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42720446 + 42720447.

It is an arithmetic number, because the mean of its divisors is an integer number (42720447).

Almost surely, 2^85440893 is an apocalyptic number.

It is an amenable number.

85440893 is a deficient number, since it is larger than the sum of its proper divisors (1).

85440893 is an equidigital number, since it uses as much as digits as its factorization.

85440893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 85440893 is about 9243.4243113686. The cubic root of 85440893 is about 440.4418649979.

The spelling of 85440893 in words is "eighty-five million, four hundred forty thousand, eight hundred ninety-three".