285687469 has 2 divisors, whose sum is σ = 285687470. Its totient is φ = 285687468.

The previous prime is 285687433. The next prime is 285687487. The reversal of 285687469 is 964786582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264875625 + 20811844 = 16275^2 + 4562^2 .

It is a cyclic number.

It is not a de Polignac number, because 285687469 - 2⁷ = 285687341 is a prime.

It is a super-2 number, since 2×285687469² = 163234659887251922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285687769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142843734 + 142843735.

It is an arithmetic number, because the mean of its divisors is an integer number (142843735).

Almost surely, 2^285687469 is an apocalyptic number.

It is an amenable number.

285687469 is a deficient number, since it is larger than the sum of its proper divisors (1).

285687469 is an equidigital number, since it uses as much as digits as its factorization.

285687469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 55.

The square root of 285687469 is about 16902.2918268500. The cubic root of 285687469 is about 658.6131492382.

The spelling of 285687469 in words is "two hundred eighty-five million, six hundred eighty-seven thousand, four hundred sixty-nine".