1310404391 has 2 divisors, whose sum is σ = 1310404392. Its totient is φ = 1310404390.

The previous prime is 1310404373. The next prime is 1310404399. The reversal of 1310404391 is 1934040131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1310404391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1310404391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310404399) 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, 655202195 + 655202196.

It is an arithmetic number, because the mean of its divisors is an integer number (655202196).

Almost surely, 2^1310404391 is an apocalyptic number.

1310404391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310404391 is an equidigital number, since it uses as much as digits as its factorization.

1310404391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1310404391 is about 36199.5081596422. The cubic root of 1310404391 is about 1094.2967596619.

The spelling of 1310404391 in words is "one billion, three hundred ten million, four hundred four thousand, three hundred ninety-one".