1340170109 has 4 divisors (see below), whose sum is σ = 1342261500. Its totient is φ = 1338078720.

The previous prime is 1340170103. The next prime is 1340170133. The reversal of 1340170109 is 9010710431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9010710431 = 1283 ⋅7023157.

It can be written as a sum of positive squares in 2 ways, for example, as 849547609 + 490622500 = 29147^2 + 22150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340170109 - 2⁴ = 1340170093 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 (1340170103) 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, 1044734 + ... + 1046015.

It is an arithmetic number, because the mean of its divisors is an integer number (335565375).

Almost surely, 2^1340170109 is an apocalyptic number.

It is an amenable number.

1340170109 is a deficient number, since it is larger than the sum of its proper divisors (2091391).

1340170109 is an equidigital number, since it uses as much as digits as its factorization.

1340170109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091390.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1340170109 is about 36608.3338735868. Note that the first 3 decimals coincide. The cubic root of 1340170109 is about 1102.5204213939.

The spelling of 1340170109 in words is "one billion, three hundred forty million, one hundred seventy thousand, one hundred nine".