345830809 has 2 divisors, whose sum is σ = 345830810. Its totient is φ = 345830808.

The previous prime is 345830789. The next prime is 345830827. The reversal of 345830809 is 908038543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343286784 + 2544025 = 18528^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 345830809 - 2⁹ = 345830297 is a prime.

It is not a weakly prime, because it can be changed into another prime (345830909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172915404 + 172915405.

It is an arithmetic number, because the mean of its divisors is an integer number (172915405).

Almost surely, 2^345830809 is an apocalyptic number.

It is an amenable number.

345830809 is a deficient number, since it is larger than the sum of its proper divisors (1).

345830809 is an equidigital number, since it uses as much as digits as its factorization.

345830809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 345830809 is about 18596.5267993784. The cubic root of 345830809 is about 701.9204468526.

The spelling of 345830809 in words is "three hundred forty-five million, eight hundred thirty thousand, eight hundred nine".