1391345411 has 2 divisors, whose sum is σ = 1391345412. Its totient is φ = 1391345410.

The previous prime is 1391345377. The next prime is 1391345413. The reversal of 1391345411 is 1145431931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1391345411 is a prime.

Together with 1391345413, 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 (1391345413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695672705 + 695672706.

It is an arithmetic number, because the mean of its divisors is an integer number (695672706).

Almost surely, 2^1391345411 is an apocalyptic number.

1391345411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391345411 is an equidigital number, since it uses as much as digits as its factorization.

1391345411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 1391345411 is about 37300.7427674034. The cubic root of 1391345411 is about 1116.3789867778.

The spelling of 1391345411 in words is "one billion, three hundred ninety-one million, three hundred forty-five thousand, four hundred eleven".