440542243 has 2 divisors, whose sum is σ = 440542244. Its totient is φ = 440542242.

The previous prime is 440542241. The next prime is 440542259. The reversal of 440542243 is 342245044.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 440542243 - 2¹ = 440542241 is a prime.

Together with 440542241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (440542241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220271121 + 220271122.

It is an arithmetic number, because the mean of its divisors is an integer number (220271122).

Almost surely, 2^440542243 is an apocalyptic number.

440542243 is a deficient number, since it is larger than the sum of its proper divisors (1).

440542243 is an equidigital number, since it uses as much as digits as its factorization.

440542243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 440542243 is about 20989.0981940626. The cubic root of 440542243 is about 760.9028069751.

Adding to 440542243 its reverse (342245044), we get a palindrome (782787287).

The spelling of 440542243 in words is "four hundred forty million, five hundred forty-two thousand, two hundred forty-three".