35621209 has 4 divisors (see below), whose sum is σ = 38361316. Its totient is φ = 32881104.

The previous prime is 35621203. The next prime is 35621221. The reversal of 35621209 is 90212653.

35621209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90212653 = 103 ⋅875851.

It can be written as a sum of positive squares in 2 ways, for example, as 12581209 + 23040000 = 3547^2 + 4800^2 .

It is a cyclic number.

It is not a de Polignac number, because 35621209 - 2⁵ = 35621177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (35621203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1370034 + ... + 1370059.

It is an arithmetic number, because the mean of its divisors is an integer number (9590329).

Almost surely, 2^35621209 is an apocalyptic number.

It is an amenable number.

35621209 is a deficient number, since it is larger than the sum of its proper divisors (2740107).

35621209 is a wasteful number, since it uses less digits than its factorization.

35621209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740106.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 35621209 is about 5968.3506096743. The cubic root of 35621209 is about 329.0305462780.

The spelling of 35621209 in words is "thirty-five million, six hundred twenty-one thousand, two hundred nine".