34209745 has 4 divisors (see below), whose sum is σ = 41051700. Its totient is φ = 27367792.

The previous prime is 34209739. The next prime is 34209757. The reversal of 34209745 is 54790243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54790243 = 19 ⋅2883697.

It can be written as a sum of positive squares in 2 ways, for example, as 7096896 + 27112849 = 2664^2 + 5207^2 .

It is a cyclic number.

It is not a de Polignac number, because 34209745 - 2³ = 34209737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 34209745.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3420970 + ... + 3420979.

It is an arithmetic number, because the mean of its divisors is an integer number (10262925).

Almost surely, 2^34209745 is an apocalyptic number.

It is an amenable number.

34209745 is a deficient number, since it is larger than the sum of its proper divisors (6841955).

34209745 is an equidigital number, since it uses as much as digits as its factorization.

34209745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6841954.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 34209745 is about 5848.9097274620. The cubic root of 34209745 is about 324.6259839416.

Adding to 34209745 its reverse (54790243), we get a palindrome (88999988).

The spelling of 34209745 in words is "thirty-four million, two hundred nine thousand, seven hundred forty-five".