1378914539 has 2 divisors, whose sum is σ = 1378914540. Its totient is φ = 1378914538.

The previous prime is 1378914473. The next prime is 1378914541. The reversal of 1378914539 is 9354198731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378914539 - 2⁸ = 1378914283 is a prime.

Together with 1378914541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1378914839) 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, 689457269 + 689457270.

It is an arithmetic number, because the mean of its divisors is an integer number (689457270).

Almost surely, 2^1378914539 is an apocalyptic number.

1378914539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378914539 is an equidigital number, since it uses as much as digits as its factorization.

1378914539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 50.

The square root of 1378914539 is about 37133.7385540427. The cubic root of 1378914539 is about 1113.0443008199.

The spelling of 1378914539 in words is "one billion, three hundred seventy-eight million, nine hundred fourteen thousand, five hundred thirty-nine".