349870289 has 2 divisors, whose sum is σ = 349870290. Its totient is φ = 349870288.

The previous prime is 349870267. The next prime is 349870307. The reversal of 349870289 is 982078943.

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., 214915600 + 134954689 = 14660^2 + 11617^2 .

It is a cyclic number.

It is not a de Polignac number, because 349870289 - 2⁸ = 349870033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (349870249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174935144 + 174935145.

It is an arithmetic number, because the mean of its divisors is an integer number (174935145).

Almost surely, 2^349870289 is an apocalyptic number.

It is an amenable number.

349870289 is a deficient number, since it is larger than the sum of its proper divisors (1).

349870289 is an equidigital number, since it uses as much as digits as its factorization.

349870289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 349870289 is about 18704.8199403255. The cubic root of 349870289 is about 704.6428041481.

The spelling of 349870289 in words is "three hundred forty-nine million, eight hundred seventy thousand, two hundred eighty-nine".