345620189 has 2 divisors, whose sum is σ = 345620190. Its totient is φ = 345620188.

The previous prime is 345620159. The next prime is 345620207. The reversal of 345620189 is 981026543.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312936100 + 32684089 = 17690^2 + 5717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345620189 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345620159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172810094 + 172810095.

It is an arithmetic number, because the mean of its divisors is an integer number (172810095).

Almost surely, 2^345620189 is an apocalyptic number.

It is an amenable number.

345620189 is a deficient number, since it is larger than the sum of its proper divisors (1).

345620189 is an equidigital number, since it uses as much as digits as its factorization.

345620189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 345620189 is about 18590.8630515100. The cubic root of 345620189 is about 701.7779219499. Note that the first 3 decimals are identical.

The spelling of 345620189 in words is "three hundred forty-five million, six hundred twenty thousand, one hundred eighty-nine".