285243659 has 2 divisors, whose sum is σ = 285243660. Its totient is φ = 285243658.

The previous prime is 285243653. The next prime is 285243661. The reversal of 285243659 is 956342582.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285243659 is a prime.

Together with 285243661, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (285243653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142621829 + 142621830.

It is an arithmetic number, because the mean of its divisors is an integer number (142621830).

Almost surely, 2^285243659 is an apocalyptic number.

285243659 is a deficient number, since it is larger than the sum of its proper divisors (1).

285243659 is an equidigital number, since it uses as much as digits as its factorization.

285243659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The square root of 285243659 is about 16889.1580311157. The cubic root of 285243659 is about 658.2719248530.

The spelling of 285243659 in words is "two hundred eighty-five million, two hundred forty-three thousand, six hundred fifty-nine".