1340342313 has 4 divisors (see below), whose sum is σ = 1787123088. Its totient is φ = 893561540.

The previous prime is 1340342291. The next prime is 1340342321. The reversal of 1340342313 is 3132430431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1340342313 - 2¹⁷ = 1340211241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340342383) 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, 223390383 + ... + 223390388.

It is an arithmetic number, because the mean of its divisors is an integer number (446780772).

Almost surely, 2^1340342313 is an apocalyptic number.

It is an amenable number.

1340342313 is a deficient number, since it is larger than the sum of its proper divisors (446780775).

1340342313 is an equidigital number, since it uses as much as digits as its factorization.

1340342313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446780774.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 1340342313 is about 36610.6857761501. The cubic root of 1340342313 is about 1102.5676418410.

Adding to 1340342313 its reverse (3132430431), we get a palindrome (4472772744).

The spelling of 1340342313 in words is "one billion, three hundred forty million, three hundred forty-two thousand, three hundred thirteen".