1686413329 has 2 divisors, whose sum is σ = 1686413330. Its totient is φ = 1686413328.

The previous prime is 1686413317. The next prime is 1686413347. The reversal of 1686413329 is 9233146861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1381980625 + 304432704 = 37175^2 + 17448^2 .

It is a cyclic number.

It is not a de Polignac number, because 1686413329 - 2⁵ = 1686413297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1686413359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843206664 + 843206665.

It is an arithmetic number, because the mean of its divisors is an integer number (843206665).

Almost surely, 2^1686413329 is an apocalyptic number.

It is an amenable number.

1686413329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1686413329 is an equidigital number, since it uses as much as digits as its factorization.

1686413329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 1686413329 is about 41065.9631446774. The cubic root of 1686413329 is about 1190.2951811109.

The spelling of 1686413329 in words is "one billion, six hundred eighty-six million, four hundred thirteen thousand, three hundred twenty-nine".