1340632313 has 4 divisors (see below), whose sum is σ = 1341335028. Its totient is φ = 1339929600.

The previous prime is 1340632289. The next prime is 1340632327. The reversal of 1340632313 is 3132360431.

It is a happy number.

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 892336384 + 448295929 = 29872^2 + 21173^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340632313 - 2¹² = 1340628217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340632373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348488 + ... + 352313.

It is an arithmetic number, because the mean of its divisors is an integer number (335333757).

Almost surely, 2^1340632313 is an apocalyptic number.

It is an amenable number.

1340632313 is a deficient number, since it is larger than the sum of its proper divisors (702715).

1340632313 is an equidigital number, since it uses as much as digits as its factorization.

1340632313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702714.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 1340632313 is about 36614.6461542372. The cubic root of 1340632313 is about 1102.6471542550.

Adding to 1340632313 its reverse (3132360431), we get a palindrome (4472992744).

The spelling of 1340632313 in words is "one billion, three hundred forty million, six hundred thirty-two thousand, three hundred thirteen".