34820209 has 2 divisors, whose sum is σ = 34820210. Its totient is φ = 34820208.

The previous prime is 34820189. The next prime is 34820251. The reversal of 34820209 is 90202843.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28302400 + 6517809 = 5320^2 + 2553^2 .

It is an emirp because it is prime and its reverse (90202843) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34820209 - 2²⁵ = 1265777 is a prime.

It is not a weakly prime, because it can be changed into another prime (34820299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17410104 + 17410105.

It is an arithmetic number, because the mean of its divisors is an integer number (17410105).

Almost surely, 2^34820209 is an apocalyptic number.

It is an amenable number.

34820209 is a deficient number, since it is larger than the sum of its proper divisors (1).

34820209 is an equidigital number, since it uses as much as digits as its factorization.

34820209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 34820209 is about 5900.8651060671. The cubic root of 34820209 is about 326.5455660839.

The spelling of 34820209 in words is "thirty-four million, eight hundred twenty thousand, two hundred nine".