1345605909 has 8 divisors (see below), whose sum is σ = 1797296640. Its totient is φ = 895492896.

The previous prime is 1345605889. The next prime is 1345605929. The reversal of 1345605909 is 9095065431.

It is an interprime number because it is at equal distance from previous prime (1345605889) and next prime (1345605929).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1345605909 - 2¹² = 1345601813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345605929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392437 + ... + 395850.

It is an arithmetic number, because the mean of its divisors is an integer number (224662080).

Almost surely, 2^1345605909 is an apocalyptic number.

It is an amenable number.

1345605909 is a deficient number, since it is larger than the sum of its proper divisors (451690731).

1345605909 is an equidigital number, since it uses as much as digits as its factorization.

1345605909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788859.

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 1345605909 is about 36682.5014005316. The cubic root of 1345605909 is about 1104.0090373853.

The spelling of 1345605909 in words is "one billion, three hundred forty-five million, six hundred five thousand, nine hundred nine".