284642689 has 4 divisors (see below), whose sum is σ = 284690224. Its totient is φ = 284595156.

The previous prime is 284642681. The next prime is 284642693. The reversal of 284642689 is 986246482.

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 284642689 - 2³ = 284642681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (284642681) 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, 13227 + ... + 27280.

It is an arithmetic number, because the mean of its divisors is an integer number (71172556).

Almost surely, 2^284642689 is an apocalyptic number.

It is an amenable number.

284642689 is a deficient number, since it is larger than the sum of its proper divisors (47535).

284642689 is an equidigital number, since it uses as much as digits as its factorization.

284642689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47534.

The product of its digits is 1327104, while the sum is 49.

The square root of 284642689 is about 16871.3570586364. The cubic root of 284642689 is about 657.8093030227.

The spelling of 284642689 in words is "two hundred eighty-four million, six hundred forty-two thousand, six hundred eighty-nine".