561829 has 2 divisors, whose sum is σ = 561830. Its totient is φ = 561828.

The previous prime is 561809. The next prime is 561839. The reversal of 561829 is 928165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 452929 + 108900 = 673^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 561829 - 2⁵ = 561797 is a prime.

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 561829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280914 + 280915.

It is an arithmetic number, because the mean of its divisors is an integer number (280915).

2⁵⁶¹⁸²⁹ is an apocalyptic number.

It is an amenable number.

561829 is a deficient number, since it is larger than the sum of its proper divisors (1).

561829 is an equidigital number, since it uses as much as digits as its factorization.

561829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 561829 is about 749.5525331823. The cubic root of 561829 is about 82.5153445593.

The spelling of 561829 in words is "five hundred sixty-one thousand, eight hundred twenty-nine".