345706289 has 2 divisors, whose sum is σ = 345706290. Its totient is φ = 345706288.

The previous prime is 345706259. The next prime is 345706321. The reversal of 345706289 is 982607543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255456289 + 90250000 = 15983^2 + 9500^2 .

It is an emirp because it is prime and its reverse (982607543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345706289 - 2¹² = 345702193 is a prime.

It is not a weakly prime, because it can be changed into another prime (345706259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172853144 + 172853145.

It is an arithmetic number, because the mean of its divisors is an integer number (172853145).

Almost surely, 2^345706289 is an apocalyptic number.

It is an amenable number.

345706289 is a deficient number, since it is larger than the sum of its proper divisors (1).

345706289 is an equidigital number, since it uses as much as digits as its factorization.

345706289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 345706289 is about 18593.1785609669. The cubic root of 345706289 is about 701.8361921400.

The spelling of 345706289 in words is "three hundred forty-five million, seven hundred six thousand, two hundred eighty-nine".