34398209 has 4 divisors (see below), whose sum is σ = 34409940. Its totient is φ = 34386480.

The previous prime is 34398193. The next prime is 34398211. The reversal of 34398209 is 90289343.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90289343 = 89 ⋅1014487.

It can be written as a sum of positive squares in 2 ways, for example, as 8673025 + 25725184 = 2945^2 + 5072^2 .

It is a cyclic number.

It is not a de Polignac number, because 34398209 - 2⁴ = 34398193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34398509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2927 + ... + 8795.

It is an arithmetic number, because the mean of its divisors is an integer number (8602485).

It is a Proth number, since it is equal to 4199 ⋅ 2¹³ + 1 and 4199 < 2¹³.

Almost surely, 2^34398209 is an apocalyptic number.

It is an amenable number.

34398209 is a deficient number, since it is larger than the sum of its proper divisors (11731).

34398209 is an equidigital number, since it uses as much as digits as its factorization.

34398209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11730.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 34398209 is about 5864.9986359760. The cubic root of 34398209 is about 325.2210220425.

The spelling of 34398209 in words is "thirty-four million, three hundred ninety-eight thousand, two hundred nine".