349578389 has 2 divisors, whose sum is σ = 349578390. Its totient is φ = 349578388.

The previous prime is 349578377. The next prime is 349578419. The reversal of 349578389 is 983875943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250177489 + 99400900 = 15817^2 + 9970^2 .

It is a cyclic number.

It is not a de Polignac number, because 349578389 - 2²⁴ = 332801173 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 (349578319) 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, 174789194 + 174789195.

It is an arithmetic number, because the mean of its divisors is an integer number (174789195).

Almost surely, 2^349578389 is an apocalyptic number.

It is an amenable number.

349578389 is a deficient number, since it is larger than the sum of its proper divisors (1).

349578389 is an equidigital number, since it uses as much as digits as its factorization.

349578389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 56.

The square root of 349578389 is about 18697.0155105033. The cubic root of 349578389 is about 704.4467863007.

The spelling of 349578389 in words is "three hundred forty-nine million, five hundred seventy-eight thousand, three hundred eighty-nine".