1329478373 has 2 divisors, whose sum is σ = 1329478374. Its totient is φ = 1329478372.

The previous prime is 1329478363. The next prime is 1329478433. The reversal of 1329478373 is 3738749231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 747366244 + 582112129 = 27338^2 + 24127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329478373 - 2²⁰ = 1328429797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329478303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664739186 + 664739187.

It is an arithmetic number, because the mean of its divisors is an integer number (664739187).

Almost surely, 2^1329478373 is an apocalyptic number.

It is an amenable number.

1329478373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329478373 is an equidigital number, since it uses as much as digits as its factorization.

1329478373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 47.

The square root of 1329478373 is about 36462.0127392880. The cubic root of 1329478373 is about 1099.5806591679.

The spelling of 1329478373 in words is "one billion, three hundred twenty-nine million, four hundred seventy-eight thousand, three hundred seventy-three".