345354389 has 2 divisors, whose sum is σ = 345354390. Its totient is φ = 345354388.

The previous prime is 345354349. The next prime is 345354391. The reversal of 345354389 is 983453543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291214225 + 54140164 = 17065^2 + 7358^2 .

It is an emirp because it is prime and its reverse (983453543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345354389 - 2¹² = 345350293 is a prime.

It is a Sophie Germain prime.

Together with 345354391, it forms a pair of twin primes.

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 (345354349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172677194 + 172677195.

It is an arithmetic number, because the mean of its divisors is an integer number (172677195).

Almost surely, 2^345354389 is an apocalyptic number.

It is an amenable number.

345354389 is a deficient number, since it is larger than the sum of its proper divisors (1).

345354389 is an equidigital number, since it uses as much as digits as its factorization.

345354389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 44.

The square root of 345354389 is about 18583.7130035954. The cubic root of 345354389 is about 701.5979745049.

The spelling of 345354389 in words is "three hundred forty-five million, three hundred fifty-four thousand, three hundred eighty-nine".