1340669899 has 2 divisors, whose sum is σ = 1340669900. Its totient is φ = 1340669898.

The previous prime is 1340669881. The next prime is 1340670007. The reversal of 1340669899 is 9989660431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340669899 - 2¹¹ = 1340667851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340669809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670334949 + 670334950.

It is an arithmetic number, because the mean of its divisors is an integer number (670334950).

Almost surely, 2^1340669899 is an apocalyptic number.

1340669899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340669899 is an equidigital number, since it uses as much as digits as its factorization.

1340669899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 1340669899 is about 36615.1594151930. The cubic root of 1340669899 is about 1102.6574587728.

The spelling of 1340669899 in words is "one billion, three hundred forty million, six hundred sixty-nine thousand, eight hundred ninety-nine".