85281783 has 4 divisors (see below), whose sum is σ = 113709048. Its totient is φ = 56854520.

The previous prime is 85281751. The next prime is 85281787. The reversal of 85281783 is 38718258.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85281783 - 2⁵ = 85281751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85281787) 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, 14213628 + ... + 14213633.

It is an arithmetic number, because the mean of its divisors is an integer number (28427262).

Almost surely, 2^85281783 is an apocalyptic number.

85281783 is a deficient number, since it is larger than the sum of its proper divisors (28427265).

85281783 is a wasteful number, since it uses less digits than its factorization.

85281783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28427264.

The product of its digits is 107520, while the sum is 42.

The square root of 85281783 is about 9234.8136418663. The cubic root of 85281783 is about 440.1682947808.

The spelling of 85281783 in words is "eighty-five million, two hundred eighty-one thousand, seven hundred eighty-three".