30440209 has 2 divisors, whose sum is σ = 30440210. Its totient is φ = 30440208.

The previous prime is 30440191. The next prime is 30440213. The reversal of 30440209 is 90204403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17139600 + 13300609 = 4140^2 + 3647^2 .

It is a cyclic number.

It is not a de Polignac number, because 30440209 - 2⁹ = 30439697 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30440209.

It is not a weakly prime, because it can be changed into another prime (30440239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15220104 + 15220105.

It is an arithmetic number, because the mean of its divisors is an integer number (15220105).

Almost surely, 2^30440209 is an apocalyptic number.

It is an amenable number.

30440209 is a deficient number, since it is larger than the sum of its proper divisors (1).

30440209 is an equidigital number, since it uses as much as digits as its factorization.

30440209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 30440209 is about 5517.2646302312. The cubic root of 30440209 is about 312.2356898982.

The spelling of 30440209 in words is "thirty million, four hundred forty thousand, two hundred nine".