1313809969 has 2 divisors, whose sum is σ = 1313809970. Its totient is φ = 1313809968.

The previous prime is 1313809909. The next prime is 1313809993. The reversal of 1313809969 is 9699083131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671846400 + 641963569 = 25920^2 + 25337^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313809969 - 2¹³ = 1313801777 is a prime.

It is a super-2 number, since 2×1313809969² = 3452193269287561922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1313809909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656904984 + 656904985.

It is an arithmetic number, because the mean of its divisors is an integer number (656904985).

Almost surely, 2^1313809969 is an apocalyptic number.

It is an amenable number.

1313809969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313809969 is an equidigital number, since it uses as much as digits as its factorization.

1313809969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 1313809969 is about 36246.5166464310. The cubic root of 1313809969 is about 1095.2439200011.

The spelling of 1313809969 in words is "one billion, three hundred thirteen million, eight hundred nine thousand, nine hundred sixty-nine".