243703943 has 4 divisors (see below), whose sum is σ = 278518800. Its totient is φ = 208889088.

The previous prime is 243703939. The next prime is 243703951. The reversal of 243703943 is 349307342.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349307342 = 2 ⋅174653671.

It is a cyclic number.

It is not a de Polignac number, because 243703943 - 2² = 243703939 is a prime.

It is a super-2 number, since 2×243703943² = 118783223667494498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243703903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17407418 + ... + 17407431.

It is an arithmetic number, because the mean of its divisors is an integer number (69629700).

Almost surely, 2^243703943 is an apocalyptic number.

243703943 is a deficient number, since it is larger than the sum of its proper divisors (34814857).

243703943 is an equidigital number, since it uses as much as digits as its factorization.

243703943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34814856.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 243703943 is about 15611.0199218373. The cubic root of 243703943 is about 624.6271423010.

The spelling of 243703943 in words is "two hundred forty-three million, seven hundred three thousand, nine hundred forty-three".