349739561 has 2 divisors, whose sum is σ = 349739562. Its totient is φ = 349739560.

The previous prime is 349739513. The next prime is 349739567. The reversal of 349739561 is 165937943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215179561 + 134560000 = 14669^2 + 11600^2 .

It is an emirp because it is prime and its reverse (165937943) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 349739561 - 2¹⁰ = 349738537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (349739567) 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, 174869780 + 174869781.

It is an arithmetic number, because the mean of its divisors is an integer number (174869781).

Almost surely, 2^349739561 is an apocalyptic number.

It is an amenable number.

349739561 is a deficient number, since it is larger than the sum of its proper divisors (1).

349739561 is an equidigital number, since it uses as much as digits as its factorization.

349739561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 47.

The square root of 349739561 is about 18701.3251134779. The cubic root of 349739561 is about 704.5550306476. Note that the first 3 decimals are identical.

The spelling of 349739561 in words is "three hundred forty-nine million, seven hundred thirty-nine thousand, five hundred sixty-one".