284240639 has 2 divisors, whose sum is σ = 284240640. Its totient is φ = 284240638.

The previous prime is 284240633. The next prime is 284240641. The reversal of 284240639 is 936042482.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284240639 is a prime.

Together with 284240641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284240633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142120319 + 142120320.

It is an arithmetic number, because the mean of its divisors is an integer number (142120320).

Almost surely, 2^284240639 is an apocalyptic number.

284240639 is a deficient number, since it is larger than the sum of its proper divisors (1).

284240639 is an equidigital number, since it uses as much as digits as its factorization.

284240639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 284240639 is about 16859.4376833867. The cubic root of 284240639 is about 657.4994445484.

The spelling of 284240639 in words is "two hundred eighty-four million, two hundred forty thousand, six hundred thirty-nine".