1343857379 has 2 divisors, whose sum is σ = 1343857380. Its totient is φ = 1343857378.

The previous prime is 1343857351. The next prime is 1343857381. The reversal of 1343857379 is 9737583431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1343857379 is a prime.

It is a Sophie Germain prime.

Together with 1343857381, 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 (1343857079) 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, 671928689 + 671928690.

It is an arithmetic number, because the mean of its divisors is an integer number (671928690).

Almost surely, 2^1343857379 is an apocalyptic number.

1343857379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343857379 is an equidigital number, since it uses as much as digits as its factorization.

1343857379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 50.

The square root of 1343857379 is about 36658.6603546829. The cubic root of 1343857379 is about 1103.5306334052.

The spelling of 1343857379 in words is "one billion, three hundred forty-three million, eight hundred fifty-seven thousand, three hundred seventy-nine".