1313498309 has 2 divisors, whose sum is σ = 1313498310. Its totient is φ = 1313498308.

The previous prime is 1313498281. The next prime is 1313498369. The reversal of 1313498309 is 9038943131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768509284 + 544989025 = 27722^2 + 23345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313498309 - 2¹⁶ = 1313432773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313498369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656749154 + 656749155.

It is an arithmetic number, because the mean of its divisors is an integer number (656749155).

Almost surely, 2^1313498309 is an apocalyptic number.

It is an amenable number.

1313498309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313498309 is an equidigital number, since it uses as much as digits as its factorization.

1313498309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1313498309 is about 36242.2172197011. The cubic root of 1313498309 is about 1095.1573091206.

The spelling of 1313498309 in words is "one billion, three hundred thirteen million, four hundred ninety-eight thousand, three hundred nine".