1340022209 has 4 divisors (see below), whose sum is σ = 1340738004. Its totient is φ = 1339306416.

The previous prime is 1340022179. The next prime is 1340022221. The reversal of 1340022209 is 9022200431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 609941809 + 730080400 = 24697^2 + 27020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340022209 - 2²⁰ = 1338973633 is a prime.

It is a super-2 number, since 2×1340022209² = 3591319041226479362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340022239) 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, 355082 + ... + 358835.

It is an arithmetic number, because the mean of its divisors is an integer number (335184501).

Almost surely, 2^1340022209 is an apocalyptic number.

It is an amenable number.

1340022209 is a deficient number, since it is larger than the sum of its proper divisors (715795).

1340022209 is an equidigital number, since it uses as much as digits as its factorization.

1340022209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715794.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1340022209 is about 36606.3137860124. The cubic root of 1340022209 is about 1102.4798621723.

The spelling of 1340022209 in words is "one billion, three hundred forty million, twenty-two thousand, two hundred nine".