285605493 has 4 divisors (see below), whose sum is σ = 380807328. Its totient is φ = 190403660.

The previous prime is 285605471. The next prime is 285605519. The reversal of 285605493 is 394506582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 285605493 - 2⁶ = 285605429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285605293) 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, 47600913 + ... + 47600918.

It is an arithmetic number, because the mean of its divisors is an integer number (95201832).

Almost surely, 2^285605493 is an apocalyptic number.

It is an amenable number.

285605493 is a deficient number, since it is larger than the sum of its proper divisors (95201835).

285605493 is an equidigital number, since it uses as much as digits as its factorization.

285605493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95201834.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 285605493 is about 16899.8666562787. The cubic root of 285605493 is about 658.5501484159.

The spelling of 285605493 in words is "two hundred eighty-five million, six hundred five thousand, four hundred ninety-three".