340649 has 2 divisors, whose sum is σ = 340650. Its totient is φ = 340648.

The previous prime is 340643. The next prime is 340657. The reversal of 340649 is 946043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196249 + 144400 = 443^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 340649 - 2⁴ = 340633 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340649.

It is not a weakly prime, because it can be changed into another prime (340643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170324 + 170325.

It is an arithmetic number, because the mean of its divisors is an integer number (170325).

2³⁴⁰⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

340649 is a deficient number, since it is larger than the sum of its proper divisors (1).

340649 is an equidigital number, since it uses as much as digits as its factorization.

340649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 340649 is about 583.6514370752. The cubic root of 340649 is about 69.8397012260.

It can be divided in two parts, 340 and 649, that added together give a palindrome (989).

The spelling of 340649 in words is "three hundred forty thousand, six hundred forty-nine".