345518189 has 2 divisors, whose sum is σ = 345518190. Its totient is φ = 345518188.

The previous prime is 345518161. The next prime is 345518227. The reversal of 345518189 is 981815543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241274089 + 104244100 = 15533^2 + 10210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345518189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345518689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172759094 + 172759095.

It is an arithmetic number, because the mean of its divisors is an integer number (172759095).

Almost surely, 2^345518189 is an apocalyptic number.

It is an amenable number.

345518189 is a deficient number, since it is larger than the sum of its proper divisors (1).

345518189 is an equidigital number, since it uses as much as digits as its factorization.

345518189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 44.

The square root of 345518189 is about 18588.1195660024. The cubic root of 345518189 is about 701.7088785383.

The spelling of 345518189 in words is "three hundred forty-five million, five hundred eighteen thousand, one hundred eighty-nine".