85909783 has 4 divisors (see below), whose sum is σ = 85971168. Its totient is φ = 85848400.

The previous prime is 85909781. The next prime is 85909793. The reversal of 85909783 is 38790958.

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 85909783 - 2¹ = 85909781 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 (85909781) 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, 28543 + ... + 31408.

It is an arithmetic number, because the mean of its divisors is an integer number (21492792).

Almost surely, 2^85909783 is an apocalyptic number.

85909783 is a deficient number, since it is larger than the sum of its proper divisors (61385).

85909783 is a wasteful number, since it uses less digits than its factorization.

85909783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61384.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 85909783 is about 9268.7530445039. The cubic root of 85909783 is about 441.2460940678.

The spelling of 85909783 in words is "eighty-five million, nine hundred nine thousand, seven hundred eighty-three".