1313643497 has 2 divisors, whose sum is σ = 1313643498. Its totient is φ = 1313643496.

The previous prime is 1313643427. The next prime is 1313643553. The reversal of 1313643497 is 7943463131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 711235561 + 602407936 = 26669^2 + 24544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313643497 - 2²⁶ = 1246534633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313643427) 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, 656821748 + 656821749.

It is an arithmetic number, because the mean of its divisors is an integer number (656821749).

Almost surely, 2^1313643497 is an apocalyptic number.

It is an amenable number.

1313643497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313643497 is an equidigital number, since it uses as much as digits as its factorization.

1313643497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 41.

The square root of 1313643497 is about 36244.2201875002. The cubic root of 1313643497 is about 1095.1976588341.

The spelling of 1313643497 in words is "one billion, three hundred thirteen million, six hundred forty-three thousand, four hundred ninety-seven".