1800829 has 2 divisors, whose sum is σ = 1800830. Its totient is φ = 1800828.

The previous prime is 1800823. The next prime is 1800833. The reversal of 1800829 is 9280081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1695204 + 105625 = 1302^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1800829 - 2¹¹ = 1798781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1800797 and 1800806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1800823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900414 + 900415.

It is an arithmetic number, because the mean of its divisors is an integer number (900415).

2^1800829 is an apocalyptic number.

It is an amenable number.

1800829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1800829 is an equidigital number, since it uses as much as digits as its factorization.

1800829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1800829 is about 1341.9497009948. The cubic root of 1800829 is about 121.6627116581.

The spelling of 1800829 in words is "one million, eight hundred thousand, eight hundred twenty-nine".