1378939713 has 4 divisors (see below), whose sum is σ = 1838586288. Its totient is φ = 919293140.

The previous prime is 1378939703. The next prime is 1378939729. The reversal of 1378939713 is 3179398731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1378939713 - 2⁴ = 1378939697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1378939703) 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 in 3 ways as a sum of consecutive naturals, for example, 229823283 + ... + 229823288.

It is an arithmetic number, because the mean of its divisors is an integer number (459646572).

Almost surely, 2^1378939713 is an apocalyptic number.

It is an amenable number.

1378939713 is a deficient number, since it is larger than the sum of its proper divisors (459646575).

1378939713 is an equidigital number, since it uses as much as digits as its factorization.

1378939713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459646574.

The product of its digits is 857304, while the sum is 51.

The square root of 1378939713 is about 37134.0775164807. The cubic root of 1378939713 is about 1113.0510741685.

The spelling of 1378939713 in words is "one billion, three hundred seventy-eight million, nine hundred thirty-nine thousand, seven hundred thirteen".