349377389 has 2 divisors, whose sum is σ = 349377390. Its totient is φ = 349377388.

The previous prime is 349377361. The next prime is 349377403. The reversal of 349377389 is 983773943.

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., 182709289 + 166668100 = 13517^2 + 12910^2 .

It is a cyclic number.

It is not a de Polignac number, because 349377389 - 2¹² = 349373293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 349377389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349377689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174688694 + 174688695.

It is an arithmetic number, because the mean of its divisors is an integer number (174688695).

Almost surely, 2^349377389 is an apocalyptic number.

It is an amenable number.

349377389 is a deficient number, since it is larger than the sum of its proper divisors (1).

349377389 is an equidigital number, since it uses as much as digits as its factorization.

349377389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 53.

The square root of 349377389 is about 18691.6395482044. The cubic root of 349377389 is about 704.3117465357.

The spelling of 349377389 in words is "three hundred forty-nine million, three hundred seventy-seven thousand, three hundred eighty-nine".