1391305967 has 2 divisors, whose sum is σ = 1391305968. Its totient is φ = 1391305966.

The previous prime is 1391305933. The next prime is 1391305969. The reversal of 1391305967 is 7695031931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1391305967 - 2²⁴ = 1374528751 is a prime.

Together with 1391305969, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391305969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695652983 + 695652984.

It is an arithmetic number, because the mean of its divisors is an integer number (695652984).

Almost surely, 2^1391305967 is an apocalyptic number.

1391305967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391305967 is an equidigital number, since it uses as much as digits as its factorization.

1391305967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 1391305967 is about 37300.2140342385. The cubic root of 1391305967 is about 1116.3684370685.

The spelling of 1391305967 in words is "one billion, three hundred ninety-one million, three hundred five thousand, nine hundred sixty-seven".