285529997 has 2 divisors, whose sum is σ = 285529998. Its totient is φ = 285529996.

The previous prime is 285529963. The next prime is 285530009. The reversal of 285529997 is 799925582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274863241 + 10666756 = 16579^2 + 3266^2 .

It is a cyclic number.

It is not a de Polignac number, because 285529997 - 2²² = 281335693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285529957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142764998 + 142764999.

It is an arithmetic number, because the mean of its divisors is an integer number (142764999).

Almost surely, 2^285529997 is an apocalyptic number.

It is an amenable number.

285529997 is a deficient number, since it is larger than the sum of its proper divisors (1).

285529997 is an equidigital number, since it uses as much as digits as its factorization.

285529997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 56.

The square root of 285529997 is about 16897.6328815607. The cubic root of 285529997 is about 658.4921169883.

The spelling of 285529997 in words is "two hundred eighty-five million, five hundred twenty-nine thousand, nine hundred ninety-seven".