1326506729 has 2 divisors, whose sum is σ = 1326506730. Its totient is φ = 1326506728.

The previous prime is 1326506711. The next prime is 1326506759. The reversal of 1326506729 is 9276056231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737231104 + 589275625 = 27152^2 + 24275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326506729 - 2¹² = 1326502633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1326506759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663253364 + 663253365.

It is an arithmetic number, because the mean of its divisors is an integer number (663253365).

Almost surely, 2^1326506729 is an apocalyptic number.

It is an amenable number.

1326506729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326506729 is an equidigital number, since it uses as much as digits as its factorization.

1326506729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 1326506729 is about 36421.2400804805. The cubic root of 1326506729 is about 1098.7607887814.

The spelling of 1326506729 in words is "one billion, three hundred twenty-six million, five hundred six thousand, seven hundred twenty-nine".