1340565659 has 2 divisors, whose sum is σ = 1340565660. Its totient is φ = 1340565658.

The previous prime is 1340565647. The next prime is 1340565671. The reversal of 1340565659 is 9565650431.

It is a balanced prime because it is at equal distance from previous prime (1340565647) and next prime (1340565671).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340565659 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340565059) 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 as a sum of consecutive naturals, namely, 670282829 + 670282830.

It is an arithmetic number, because the mean of its divisors is an integer number (670282830).

Almost surely, 2^1340565659 is an apocalyptic number.

1340565659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340565659 is an equidigital number, since it uses as much as digits as its factorization.

1340565659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486000, while the sum is 44.

The square root of 1340565659 is about 36613.7359333898. The cubic root of 1340565659 is about 1102.6288800270.

The spelling of 1340565659 in words is "one billion, three hundred forty million, five hundred sixty-five thousand, six hundred fifty-nine".