243662443 has 4 divisors (see below), whose sum is σ = 243697608. Its totient is φ = 243627280.

The previous prime is 243662407. The next prime is 243662453. The reversal of 243662443 is 344266342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243662443 - 2¹⁷ = 243531371 is a prime.

It is a super-2 number, since 2×243662443² = 118742772257456498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243662399 and 243662408.

It is not an unprimeable number, because it can be changed into a prime (243662453) 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, 3346 + ... + 22327.

It is an arithmetic number, because the mean of its divisors is an integer number (60924402).

Almost surely, 2^243662443 is an apocalyptic number.

243662443 is a deficient number, since it is larger than the sum of its proper divisors (35165).

243662443 is an equidigital number, since it uses as much as digits as its factorization.

243662443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35164.

The product of its digits is 82944, while the sum is 34.

The square root of 243662443 is about 15609.6906759871. The cubic root of 243662443 is about 624.5916846638.

The spelling of 243662443 in words is "two hundred forty-three million, six hundred sixty-two thousand, four hundred forty-three".