1340662513 has 4 divisors (see below), whose sum is σ = 1342467648. Its totient is φ = 1338857380.

The previous prime is 1340662501. The next prime is 1340662537. The reversal of 1340662513 is 3152660431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3152660431 = 9349 ⋅337219.

It is a cyclic number.

It is not a de Polignac number, because 1340662513 - 2²⁵ = 1307108081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340612513) 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, 901453 + ... + 902938.

It is an arithmetic number, because the mean of its divisors is an integer number (335616912).

Almost surely, 2^1340662513 is an apocalyptic number.

It is an amenable number.

1340662513 is a deficient number, since it is larger than the sum of its proper divisors (1805135).

1340662513 is an equidigital number, since it uses as much as digits as its factorization.

1340662513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805134.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1340662513 is about 36615.0585551901. The cubic root of 1340662513 is about 1102.6554338540.

The spelling of 1340662513 in words is "one billion, three hundred forty million, six hundred sixty-two thousand, five hundred thirteen".