30402209 has 2 divisors, whose sum is σ = 30402210. Its totient is φ = 30402208.

The previous prime is 30402199. The next prime is 30402257. The reversal of 30402209 is 90220403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27793984 + 2608225 = 5272^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 30402209 - 2⁴ = 30402193 is a prime.

It is not a weakly prime, because it can be changed into another prime (30402509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15201104 + 15201105.

It is an arithmetic number, because the mean of its divisors is an integer number (15201105).

Almost surely, 2^30402209 is an apocalyptic number.

It is an amenable number.

30402209 is a deficient number, since it is larger than the sum of its proper divisors (1).

30402209 is an equidigital number, since it uses as much as digits as its factorization.

30402209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30402209 is about 5513.8198193267. The cubic root of 30402209 is about 312.1057094411.

The spelling of 30402209 in words is "thirty million, four hundred two thousand, two hundred nine".