1340520613 has 4 divisors (see below), whose sum is σ = 1342606048. Its totient is φ = 1338435180.

The previous prime is 1340520611. The next prime is 1340520617. The reversal of 1340520613 is 3160250431.

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 1340520613 - 2¹ = 1340520611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340520611) 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, 1041753 + ... + 1043038.

It is an arithmetic number, because the mean of its divisors is an integer number (335651512).

Almost surely, 2^1340520613 is an apocalyptic number.

It is an amenable number.

1340520613 is a deficient number, since it is larger than the sum of its proper divisors (2085435).

1340520613 is an equidigital number, since it uses as much as digits as its factorization.

1340520613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085434.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1340520613 is about 36613.1207765741. The cubic root of 1340520613 is about 1102.6165296244.

The spelling of 1340520613 in words is "one billion, three hundred forty million, five hundred twenty thousand, six hundred thirteen".