1321413109 has 2 divisors, whose sum is σ = 1321413110. Its totient is φ = 1321413108.

The previous prime is 1321413103. The next prime is 1321413143. The reversal of 1321413109 is 9013141231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 965034225 + 356378884 = 31065^2 + 18878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321413109 - 2¹⁵ = 1321380341 is a prime.

It is a super-2 number, since 2×1321413109² = 3492265209274091762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321413103) 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 as a sum of consecutive naturals, namely, 660706554 + 660706555.

It is an arithmetic number, because the mean of its divisors is an integer number (660706555).

Almost surely, 2^1321413109 is an apocalyptic number.

It is an amenable number.

1321413109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321413109 is an equidigital number, since it uses as much as digits as its factorization.

1321413109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1321413109 is about 36351.2463197619. The cubic root of 1321413109 is about 1097.3526168182.

The spelling of 1321413109 in words is "one billion, three hundred twenty-one million, four hundred thirteen thousand, one hundred nine".