1313241997 has 2 divisors, whose sum is σ = 1313241998. Its totient is φ = 1313241996.

The previous prime is 1313241983. The next prime is 1313242033. The reversal of 1313241997 is 7991423131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 899160196 + 414081801 = 29986^2 + 20349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313241997 - 2¹⁵ = 1313209229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313241697) 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, 656620998 + 656620999.

It is an arithmetic number, because the mean of its divisors is an integer number (656620999).

Almost surely, 2^1313241997 is an apocalyptic number.

It is an amenable number.

1313241997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313241997 is an equidigital number, since it uses as much as digits as its factorization.

1313241997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 1313241997 is about 36238.6809500567. The cubic root of 1313241997 is about 1095.0860692825.

The spelling of 1313241997 in words is "one billion, three hundred thirteen million, two hundred forty-one thousand, nine hundred ninety-seven".