1662131329 has 2 divisors, whose sum is σ = 1662131330. Its totient is φ = 1662131328.

The previous prime is 1662131311. The next prime is 1662131399. The reversal of 1662131329 is 9231312661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1279850625 + 382280704 = 35775^2 + 19552^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662131329 - 2⁵ = 1662131297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1662131294 and 1662131303.

It is not a weakly prime, because it can be changed into another prime (1662131399) 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, 831065664 + 831065665.

It is an arithmetic number, because the mean of its divisors is an integer number (831065665).

Almost surely, 2^1662131329 is an apocalyptic number.

It is an amenable number.

1662131329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662131329 is an equidigital number, since it uses as much as digits as its factorization.

1662131329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 1662131329 is about 40769.2448912167. The cubic root of 1662131329 is about 1184.5546770371.

The spelling of 1662131329 in words is "one billion, six hundred sixty-two million, one hundred thirty-one thousand, three hundred twenty-nine".