1340299663 has 4 divisors (see below), whose sum is σ = 1383535168. Its totient is φ = 1297064160.

The previous prime is 1340299661. The next prime is 1340299693. The reversal of 1340299663 is 3669920431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3669920431 = 79 ⋅46454689.

It is a cyclic number.

It is not a de Polignac number, because 1340299663 - 2¹ = 1340299661 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 (1340299661) 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, 21617706 + ... + 21617767.

It is an arithmetic number, because the mean of its divisors is an integer number (345883792).

Almost surely, 2^1340299663 is an apocalyptic number.

1340299663 is a deficient number, since it is larger than the sum of its proper divisors (43235505).

1340299663 is an equidigital number, since it uses as much as digits as its factorization.

1340299663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43235504.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 1340299663 is about 36610.1032913047. The cubic root of 1340299663 is about 1102.5559470652. Note that the first 3 decimals are identical.

The spelling of 1340299663 in words is "one billion, three hundred forty million, two hundred ninety-nine thousand, six hundred sixty-three".