1326440413 has 2 divisors, whose sum is σ = 1326440414. Its totient is φ = 1326440412.

The previous prime is 1326440411. The next prime is 1326440447. The reversal of 1326440413 is 3140446231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1304509924 + 21930489 = 36118^2 + 4683^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326440413 - 2¹ = 1326440411 is a prime.

It is a super-2 number, since 2×1326440413² = 3518888338479221138, which contains 22 as substring.

Together with 1326440411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326440411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663220206 + 663220207.

It is an arithmetic number, because the mean of its divisors is an integer number (663220207).

Almost surely, 2^1326440413 is an apocalyptic number.

It is an amenable number.

1326440413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326440413 is an equidigital number, since it uses as much as digits as its factorization.

1326440413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1326440413 is about 36420.3296662729. The cubic root of 1326440413 is about 1098.7424783742.

Adding to 1326440413 its reverse (3140446231), we get a palindrome (4466886644).

The spelling of 1326440413 in words is "one billion, three hundred twenty-six million, four hundred forty thousand, four hundred thirteen".