285008693 has 4 divisors (see below), whose sum is σ = 285130188. Its totient is φ = 284887200.

The previous prime is 285008681. The next prime is 285008707. The reversal of 285008693 is 396800582.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80604484 + 204404209 = 8978^2 + 14297^2 .

It is a cyclic number.

It is not a de Polignac number, because 285008693 - 2¹² = 285004597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285008693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285008623) 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, 57158 + ... + 61943.

It is an arithmetic number, because the mean of its divisors is an integer number (71282547).

Almost surely, 2^285008693 is an apocalyptic number.

It is an amenable number.

285008693 is a deficient number, since it is larger than the sum of its proper divisors (121495).

285008693 is a wasteful number, since it uses less digits than its factorization.

285008693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121494.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 285008693 is about 16882.2004786106. The cubic root of 285008693 is about 658.0911273661.

The spelling of 285008693 in words is "two hundred eighty-five million, eight thousand, six hundred ninety-three".