1340543599 has 2 divisors, whose sum is σ = 1340543600. Its totient is φ = 1340543598.

The previous prime is 1340543593. The next prime is 1340543627. The reversal of 1340543599 is 9953450431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340543599 - 2¹⁹ = 1340019311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340543593) 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, 670271799 + 670271800.

It is an arithmetic number, because the mean of its divisors is an integer number (670271800).

Almost surely, 2^1340543599 is an apocalyptic number.

1340543599 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340543599 is an equidigital number, since it uses as much as digits as its factorization.

1340543599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 1340543599 is about 36613.4346790901. The cubic root of 1340543599 is about 1102.6228318025.

The spelling of 1340543599 in words is "one billion, three hundred forty million, five hundred forty-three thousand, five hundred ninety-nine".