1347861837391 has 2 divisors, whose sum is σ = 1347861837392. Its totient is φ = 1347861837390.

The previous prime is 1347861837367. The next prime is 1347861837431. The reversal of 1347861837391 is 1937381687431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1347861837391 - 2³⁹ = 798106023503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1347861837991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673930918695 + 673930918696.

It is an arithmetic number, because the mean of its divisors is an integer number (673930918696).

Almost surely, 2^{1347861837391} is an apocalyptic number.

1347861837391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1347861837391 is an equidigital number, since it uses as much as digits as its factorization.

1347861837391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 61.

The spelling of 1347861837391 in words is "one trillion, three hundred forty-seven billion, eight hundred sixty-one million, eight hundred thirty-seven thousand, three hundred ninety-one".