1326041999 has 4 divisors (see below), whose sum is σ = 1326273360. Its totient is φ = 1325810640.

The previous prime is 1326041987. The next prime is 1326042013. The reversal of 1326041999 is 9991406231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9991406231 = 1061 ⋅9416971.

It is a cyclic number.

It is not a de Polignac number, because 1326041999 - 2¹² = 1326037903 is a prime.

It is a super-2 number, since 2×1326041999² = 3516774766223832002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326041909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106859 + ... + 118620.

It is an arithmetic number, because the mean of its divisors is an integer number (331568340).

Almost surely, 2^1326041999 is an apocalyptic number.

1326041999 is a deficient number, since it is larger than the sum of its proper divisors (231361).

1326041999 is an equidigital number, since it uses as much as digits as its factorization.

1326041999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231360.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 1326041999 is about 36414.8595905573. The cubic root of 1326041999 is about 1098.6324600582.

The spelling of 1326041999 in words is "one billion, three hundred twenty-six million, forty-one thousand, nine hundred ninety-nine".