340020243 has 12 divisors (see below), whose sum is σ = 498471688. Its totient is φ = 223296480.

The previous prime is 340020209. The next prime is 340020251. The reversal of 340020243 is 342020043.

340020243 is a `hidden beast` number, since 3 + 400 + 20 + 243 = 666.

It is not a de Polignac number, because 340020243 - 2¹⁰ = 340019219 is a prime.

It is a super-2 number, since 2×340020243² = 231227531299558098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340020943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 281338 + ... + 282543.

Almost surely, 2^340020243 is an apocalyptic number.

340020243 is a deficient number, since it is larger than the sum of its proper divisors (158451445).

340020243 is a wasteful number, since it uses less digits than its factorization.

340020243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563954 (or 563951 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 340020243 is about 18439.6378218229. The cubic root of 340020243 is about 697.9670560500.

Adding to 340020243 its reverse (342020043), we get a palindrome (682040286).

The spelling of 340020243 in words is "three hundred forty million, twenty thousand, two hundred forty-three".