1722829 has 2 divisors, whose sum is σ = 1722830. Its totient is φ = 1722828.

The previous prime is 1722821. The next prime is 1722839. The reversal of 1722829 is 9282271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1684804 + 38025 = 1298^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722829 - 2³ = 1722821 is a prime.

1722829 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1722829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1722821) 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, 861414 + 861415.

It is an arithmetic number, because the mean of its divisors is an integer number (861415).

2^1722829 is an apocalyptic number.

It is an amenable number.

1722829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722829 is an equidigital number, since it uses as much as digits as its factorization.

1722829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 1722829 is about 1312.5658078740. The cubic root of 1722829 is about 119.8801813281.

The spelling of 1722829 in words is "one million, seven hundred twenty-two thousand, eight hundred twenty-nine".