345236609 has 2 divisors, whose sum is σ = 345236610. Its totient is φ = 345236608.

The previous prime is 345236599. The next prime is 345236611. The reversal of 345236609 is 906632543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342139009 + 3097600 = 18497^2 + 1760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345236609 is a prime.

Together with 345236611, 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 (345236699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172618304 + 172618305.

It is an arithmetic number, because the mean of its divisors is an integer number (172618305).

Almost surely, 2^345236609 is an apocalyptic number.

It is an amenable number.

345236609 is a deficient number, since it is larger than the sum of its proper divisors (1).

345236609 is an equidigital number, since it uses as much as digits as its factorization.

345236609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 345236609 is about 18580.5438295008. The cubic root of 345236609 is about 701.5182075489.

The spelling of 345236609 in words is "three hundred forty-five million, two hundred thirty-six thousand, six hundred nine".