1378436329 has 2 divisors, whose sum is σ = 1378436330. Its totient is φ = 1378436328.

The previous prime is 1378436327. The next prime is 1378436357. The reversal of 1378436329 is 9236348731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751034025 + 627402304 = 27405^2 + 25048^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378436329 - 2¹ = 1378436327 is a prime.

Together with 1378436327, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1378436327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689218164 + 689218165.

It is an arithmetic number, because the mean of its divisors is an integer number (689218165).

Almost surely, 2^1378436329 is an apocalyptic number.

It is an amenable number.

1378436329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378436329 is an equidigital number, since it uses as much as digits as its factorization.

1378436329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 46.

The square root of 1378436329 is about 37127.2989725889. The cubic root of 1378436329 is about 1112.9156173657.

The spelling of 1378436329 in words is "one billion, three hundred seventy-eight million, four hundred thirty-six thousand, three hundred twenty-nine".