1313031287 has 2 divisors, whose sum is σ = 1313031288. Its totient is φ = 1313031286.

The previous prime is 1313031281. The next prime is 1313031367. The reversal of 1313031287 is 7821303131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313031287 - 2¹⁴ = 1313014903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313031281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656515643 + 656515644.

It is an arithmetic number, because the mean of its divisors is an integer number (656515644).

Almost surely, 2^1313031287 is an apocalyptic number.

1313031287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313031287 is an equidigital number, since it uses as much as digits as its factorization.

1313031287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1313031287 is about 36235.7735808138. The cubic root of 1313031287 is about 1095.0274972071.

The spelling of 1313031287 in words is "one billion, three hundred thirteen million, thirty-one thousand, two hundred eighty-seven".