340553909 has 2 divisors, whose sum is σ = 340553910. Its totient is φ = 340553908.

The previous prime is 340553887. The next prime is 340553923. The reversal of 340553909 is 909355043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176969809 + 163584100 = 13303^2 + 12790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340553909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340553509) 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, 170276954 + 170276955.

It is an arithmetic number, because the mean of its divisors is an integer number (170276955).

Almost surely, 2^340553909 is an apocalyptic number.

It is an amenable number.

340553909 is a deficient number, since it is larger than the sum of its proper divisors (1).

340553909 is an equidigital number, since it uses as much as digits as its factorization.

340553909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 340553909 is about 18454.1027687612. The cubic root of 340553909 is about 698.3320211690.

The spelling of 340553909 in words is "three hundred forty million, five hundred fifty-three thousand, nine hundred nine".