285629 has 2 divisors, whose sum is σ = 285630. Its totient is φ = 285628.

The previous prime is 285613. The next prime is 285631. The reversal of 285629 is 926582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273529 + 12100 = 523^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 285629 - 2⁴ = 285613 is a prime.

Together with 285631, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 285595 and 285604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142814 + 142815.

It is an arithmetic number, because the mean of its divisors is an integer number (142815).

2²⁸⁵⁶²⁹ is an apocalyptic number.

It is an amenable number.

285629 is a deficient number, since it is larger than the sum of its proper divisors (1).

285629 is an equidigital number, since it uses as much as digits as its factorization.

285629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 285629 is about 534.4427003899. The cubic root of 285629 is about 65.8568215428.

The spelling of 285629 in words is "two hundred eighty-five thousand, six hundred twenty-nine".