34890209 has 2 divisors, whose sum is σ = 34890210. Its totient is φ = 34890208.

The previous prime is 34890203. The next prime is 34890253. The reversal of 34890209 is 90209843.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34774609 + 115600 = 5897^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 34890209 - 2²⁴ = 18112993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (34890203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17445104 + 17445105.

It is an arithmetic number, because the mean of its divisors is an integer number (17445105).

Almost surely, 2^34890209 is an apocalyptic number.

It is an amenable number.

34890209 is a deficient number, since it is larger than the sum of its proper divisors (1).

34890209 is an equidigital number, since it uses as much as digits as its factorization.

34890209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 34890209 is about 5906.7934617693. The cubic root of 34890209 is about 326.7642407165.

The spelling of 34890209 in words is "thirty-four million, eight hundred ninety thousand, two hundred nine".