349806109 has 2 divisors, whose sum is σ = 349806110. Its totient is φ = 349806108.

The previous prime is 349806089. The next prime is 349806143. The reversal of 349806109 is 901608943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326814084 + 22992025 = 18078^2 + 4795^2 .

It is a cyclic number.

It is not a de Polignac number, because 349806109 - 2²¹ = 347708957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349806199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174903054 + 174903055.

It is an arithmetic number, because the mean of its divisors is an integer number (174903055).

Almost surely, 2^349806109 is an apocalyptic number.

It is an amenable number.

349806109 is a deficient number, since it is larger than the sum of its proper divisors (1).

349806109 is an equidigital number, since it uses as much as digits as its factorization.

349806109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 349806109 is about 18703.1042610578. The cubic root of 349806109 is about 704.5997150927.

The spelling of 349806109 in words is "three hundred forty-nine million, eight hundred six thousand, one hundred nine".