85281583 has 2 divisors, whose sum is σ = 85281584. Its totient is φ = 85281582.

The previous prime is 85281577. The next prime is 85281619. The reversal of 85281583 is 38518258.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85281583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85281563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42640791 + 42640792.

It is an arithmetic number, because the mean of its divisors is an integer number (42640792).

Almost surely, 2^85281583 is an apocalyptic number.

85281583 is a deficient number, since it is larger than the sum of its proper divisors (1).

85281583 is an equidigital number, since it uses as much as digits as its factorization.

85281583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76800, while the sum is 40.

The square root of 85281583 is about 9234.8028132711. The cubic root of 85281583 is about 440.1679506912.

The spelling of 85281583 in words is "eighty-five million, two hundred eighty-one thousand, five hundred eighty-three".