340040353 has 2 divisors, whose sum is σ = 340040354. Its totient is φ = 340040352.

The previous prime is 340040317. The next prime is 340040369. The reversal of 340040353 is 353040043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291487329 + 48553024 = 17073^2 + 6968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340040353 is a prime.

It is not a weakly prime, because it can be changed into another prime (340040053) 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, 170020176 + 170020177.

It is an arithmetic number, because the mean of its divisors is an integer number (170020177).

Almost surely, 2^340040353 is an apocalyptic number.

It is an amenable number.

340040353 is a deficient number, since it is larger than the sum of its proper divisors (1).

340040353 is an equidigital number, since it uses as much as digits as its factorization.

340040353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 22.

The square root of 340040353 is about 18440.1831064662. The cubic root of 340040353 is about 697.9808158590.

Adding to 340040353 its reverse (353040043), we get a palindrome (693080396).

The spelling of 340040353 in words is "three hundred forty million, forty thousand, three hundred fifty-three".