1378043329 has 4 divisors (see below), whose sum is σ = 1484046676. Its totient is φ = 1272039984.

The previous prime is 1378043327. The next prime is 1378043351. The reversal of 1378043329 is 9233408731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114383025 + 1263660304 = 10695^2 + 35548^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378043329 - 2¹ = 1378043327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1378043291 and 1378043300.

It is not an unprimeable number, because it can be changed into a prime (1378043327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53001654 + ... + 53001679.

It is an arithmetic number, because the mean of its divisors is an integer number (371011669).

Almost surely, 2^1378043329 is an apocalyptic number.

It is an amenable number.

1378043329 is a deficient number, since it is larger than the sum of its proper divisors (106003347).

1378043329 is a wasteful number, since it uses less digits than its factorization.

1378043329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106003346.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 1378043329 is about 37122.0059937499. The cubic root of 1378043329 is about 1112.8098411319.

The spelling of 1378043329 in words is "one billion, three hundred seventy-eight million, forty-three thousand, three hundred twenty-nine".