1340635099 has 4 divisors (see below), whose sum is σ = 1349632800. Its totient is φ = 1331637400.

The previous prime is 1340635081. The next prime is 1340635139. The reversal of 1340635099 is 9905360431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9905360431 = 25621 ⋅386611.

It is a cyclic number.

It is not a de Polignac number, because 1340635099 - 2¹³ = 1340626907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340635019) 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, 4498627 + ... + 4498924.

It is an arithmetic number, because the mean of its divisors is an integer number (337408200).

Almost surely, 2^1340635099 is an apocalyptic number.

1340635099 is a deficient number, since it is larger than the sum of its proper divisors (8997701).

1340635099 is an equidigital number, since it uses as much as digits as its factorization.

1340635099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8997700.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 1340635099 is about 36614.6841991024. The cubic root of 1340635099 is about 1102.6479180669.

The spelling of 1340635099 in words is "one billion, three hundred forty million, six hundred thirty-five thousand, ninety-nine".