2345209 has 2 divisors, whose sum is σ = 2345210. Its totient is φ = 2345208.

The previous prime is 2345179. The next prime is 2345219. The reversal of 2345209 is 9025432.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1507984 + 837225 = 1228^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 2345209 - 2⁹ = 2344697 is a prime.

It is not a weakly prime, because it can be changed into another prime (2345219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1172604 + 1172605.

It is an arithmetic number, because the mean of its divisors is an integer number (1172605).

2^2345209 is an apocalyptic number.

It is an amenable number.

2345209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2345209 is an equidigital number, since it uses as much as digits as its factorization.

2345209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2345209 is about 1531.4075225099. The cubic root of 2345209 is about 132.8598784322.

The spelling of 2345209 in words is "two million, three hundred forty-five thousand, two hundred nine".