348687649 has 2 divisors, whose sum is σ = 348687650. Its totient is φ = 348687648.

The previous prime is 348687643. The next prime is 348687673. The reversal of 348687649 is 946786843.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217356049 + 131331600 = 14743^2 + 11460^2 .

It is an emirp because it is prime and its reverse (946786843) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-348687649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 348687649.

It is not a weakly prime, because it can be changed into another prime (348687643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174343824 + 174343825.

It is an arithmetic number, because the mean of its divisors is an integer number (174343825).

Almost surely, 2^348687649 is an apocalyptic number.

It is an amenable number.

348687649 is a deficient number, since it is larger than the sum of its proper divisors (1).

348687649 is an equidigital number, since it uses as much as digits as its factorization.

348687649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 55.

The square root of 348687649 is about 18673.1799380823. The cubic root of 348687649 is about 703.8479576801.

The spelling of 348687649 in words is "three hundred forty-eight million, six hundred eighty-seven thousand, six hundred forty-nine".