285291469 has 2 divisors, whose sum is σ = 285291470. Its totient is φ = 285291468.

The previous prime is 285291437. The next prime is 285291509. The reversal of 285291469 is 964192582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266930244 + 18361225 = 16338^2 + 4285^2 .

It is a cyclic number.

It is not a de Polignac number, because 285291469 - 2⁵ = 285291437 is a prime.

It is a super-2 number, since 2×285291469² = 162782444568355922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285291869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142645734 + 142645735.

It is an arithmetic number, because the mean of its divisors is an integer number (142645735).

Almost surely, 2^285291469 is an apocalyptic number.

It is an amenable number.

285291469 is a deficient number, since it is larger than the sum of its proper divisors (1).

285291469 is an equidigital number, since it uses as much as digits as its factorization.

285291469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The square root of 285291469 is about 16890.5733768869. The cubic root of 285291469 is about 658.3087006895.

The spelling of 285291469 in words is "two hundred eighty-five million, two hundred ninety-one thousand, four hundred sixty-nine".