2355209 has 2 divisors, whose sum is σ = 2355210. Its totient is φ = 2355208.

The previous prime is 2355191. The next prime is 2355211. The reversal of 2355209 is 9025532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2325625 + 29584 = 1525^2 + 172^2 .

It is a cyclic number.

It is not a de Polignac number, because 2355209 - 2⁸ = 2354953 is a prime.

Together with 2355211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2355229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1177604 + 1177605.

It is an arithmetic number, because the mean of its divisors is an integer number (1177605).

2^2355209 is an apocalyptic number.

It is an amenable number.

2355209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2355209 is an equidigital number, since it uses as much as digits as its factorization.

2355209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 2355209 is about 1534.6690196912. The cubic root of 2355209 is about 133.0484493809.

The spelling of 2355209 in words is "two million, three hundred fifty-five thousand, two hundred nine".