2171329 has 2 divisors, whose sum is σ = 2171330. Its totient is φ = 2171328.

The previous prime is 2171311. The next prime is 2171341. The reversal of 2171329 is 9231712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2169729 + 1600 = 1473^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171329 - 2¹¹ = 2169281 is a prime.

It is not a weakly prime, because it can be changed into another prime (2171929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085664 + 1085665.

It is an arithmetic number, because the mean of its divisors is an integer number (1085665).

2^2171329 is an apocalyptic number.

It is an amenable number.

2171329 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171329 is an equidigital number, since it uses as much as digits as its factorization.

2171329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 2171329 is about 1473.5430092128. The cubic root of 2171329 is about 129.4916836487.

It can be divided in two parts, 2171 and 329, that added together give a square (2500 = 50²).

The spelling of 2171329 in words is "two million, one hundred seventy-one thousand, three hundred twenty-nine".