345518689 has 2 divisors, whose sum is σ = 345518690. Its totient is φ = 345518688.

The previous prime is 345518687. The next prime is 345518699. The reversal of 345518689 is 986815543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243609664 + 101909025 = 15608^2 + 10095^2 .

It is a cyclic number.

It is not a de Polignac number, because 345518689 - 2¹ = 345518687 is a prime.

Together with 345518687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (345518687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172759344 + 172759345.

It is an arithmetic number, because the mean of its divisors is an integer number (172759345).

Almost surely, 2^345518689 is an apocalyptic number.

It is an amenable number.

345518689 is a deficient number, since it is larger than the sum of its proper divisors (1).

345518689 is an equidigital number, since it uses as much as digits as its factorization.

345518689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 49.

The square root of 345518689 is about 18588.1330154483. The cubic root of 345518689 is about 701.7092170195.

The spelling of 345518689 in words is "three hundred forty-five million, five hundred eighteen thousand, six hundred eighty-nine".