340442243 has 4 divisors (see below), whose sum is σ = 340514328. Its totient is φ = 340370160.

The previous prime is 340442233. The next prime is 340442257. The reversal of 340442243 is 342244043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342244043 = 37 ⋅9249839.

It is a cyclic number.

It is not a de Polignac number, because 340442243 - 2⁴ = 340442227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340442233) 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 in 3 ways as a sum of consecutive naturals, for example, 28421 + ... + 38582.

It is an arithmetic number, because the mean of its divisors is an integer number (85128582).

Almost surely, 2^340442243 is an apocalyptic number.

340442243 is a deficient number, since it is larger than the sum of its proper divisors (72085).

340442243 is an equidigital number, since it uses as much as digits as its factorization.

340442243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72084.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 340442243 is about 18451.0770146352. The cubic root of 340442243 is about 698.2556862472.

Adding to 340442243 its reverse (342244043), we get a palindrome (682686286).

The spelling of 340442243 in words is "three hundred forty million, four hundred forty-two thousand, two hundred forty-three".