285085649 has 2 divisors, whose sum is σ = 285085650. Its totient is φ = 285085648.

The previous prime is 285085643. The next prime is 285085651. The reversal of 285085649 is 946580582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215062225 + 70023424 = 14665^2 + 8368^2 .

It is a cyclic number.

It is not a de Polignac number, because 285085649 - 2¹² = 285081553 is a prime.

Together with 285085651, 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 (285085643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142542824 + 142542825.

It is an arithmetic number, because the mean of its divisors is an integer number (142542825).

Almost surely, 2^285085649 is an apocalyptic number.

It is an amenable number.

285085649 is a deficient number, since it is larger than the sum of its proper divisors (1).

285085649 is an equidigital number, since it uses as much as digits as its factorization.

285085649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 285085649 is about 16884.4795300299. The cubic root of 285085649 is about 658.1503530488.

The spelling of 285085649 in words is "two hundred eighty-five million, eighty-five thousand, six hundred forty-nine".