1310340391 has 2 divisors, whose sum is σ = 1310340392. Its totient is φ = 1310340390.

The previous prime is 1310340389. The next prime is 1310340461. The reversal of 1310340391 is 1930430131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1310340391 - 2¹ = 1310340389 is a prime.

Together with 1310340389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310340341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655170195 + 655170196.

It is an arithmetic number, because the mean of its divisors is an integer number (655170196).

Almost surely, 2^1310340391 is an apocalyptic number.

1310340391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310340391 is an equidigital number, since it uses as much as digits as its factorization.

1310340391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1310340391 is about 36198.6241589373. The cubic root of 1310340391 is about 1094.2789442625.

The spelling of 1310340391 in words is "one billion, three hundred ten million, three hundred forty thousand, three hundred ninety-one".