348747209 has 2 divisors, whose sum is σ = 348747210. Its totient is φ = 348747208.

The previous prime is 348747199. The next prime is 348747221. The reversal of 348747209 is 902747843.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234855625 + 113891584 = 15325^2 + 10672^2 .

It is a cyclic number.

It is not a de Polignac number, because 348747209 - 2¹² = 348743113 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 348747209.

It is not a weakly prime, because it can be changed into another prime (348749209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174373604 + 174373605.

It is an arithmetic number, because the mean of its divisors is an integer number (174373605).

Almost surely, 2^348747209 is an apocalyptic number.

It is an amenable number.

348747209 is a deficient number, since it is larger than the sum of its proper divisors (1).

348747209 is an equidigital number, since it uses as much as digits as its factorization.

348747209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 348747209 is about 18674.7746706620. The cubic root of 348747209 is about 703.8880306009. Note that the first 3 decimals are identical.

The spelling of 348747209 in words is "three hundred forty-eight million, seven hundred forty-seven thousand, two hundred nine".