285825329 has 2 divisors, whose sum is σ = 285825330. Its totient is φ = 285825328.

The previous prime is 285825313. The next prime is 285825373. The reversal of 285825329 is 923528582.

It is a happy number.

It is an a-pointer prime, because the next prime (285825373) can be obtained adding 285825329 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202066225 + 83759104 = 14215^2 + 9152^2 .

It is a cyclic number.

It is not a de Polignac number, because 285825329 - 2⁴ = 285825313 is a prime.

It is a super-2 number, since 2×285825329² = 163392237395916482, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285825329.

It is not a weakly prime, because it can be changed into another prime (285825229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142912664 + 142912665.

It is an arithmetic number, because the mean of its divisors is an integer number (142912665).

Almost surely, 2^285825329 is an apocalyptic number.

It is an amenable number.

285825329 is a deficient number, since it is larger than the sum of its proper divisors (1).

285825329 is an equidigital number, since it uses as much as digits as its factorization.

285825329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 44.

The square root of 285825329 is about 16906.3694801693. The cubic root of 285825329 is about 658.7190712891.

The spelling of 285825329 in words is "two hundred eighty-five million, eight hundred twenty-five thousand, three hundred twenty-nine".