1340343913 has 4 divisors (see below), whose sum is σ = 1345905748. Its totient is φ = 1334782080.

The previous prime is 1340343899. The next prime is 1340343943. The reversal of 1340343913 is 3193430431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 347337769 + 993006144 = 18637^2 + 31512^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340343913 - 2¹³ = 1340335721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340343943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780556 + ... + 2781037.

It is an arithmetic number, because the mean of its divisors is an integer number (336476437).

Almost surely, 2^1340343913 is an apocalyptic number.

It is an amenable number.

1340343913 is a deficient number, since it is larger than the sum of its proper divisors (5561835).

1340343913 is an equidigital number, since it uses as much as digits as its factorization.

1340343913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561834.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 1340343913 is about 36610.7076276873. The cubic root of 1340343913 is about 1102.5680805616.

The spelling of 1340343913 in words is "one billion, three hundred forty million, three hundred forty-three thousand, nine hundred thirteen".