1000538243 has 2 divisors, whose sum is σ = 1000538244. Its totient is φ = 1000538242.

The previous prime is 1000538171. The next prime is 1000538257. The reversal of 1000538243 is 3428350001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000538243 - 2²⁶ = 933429379 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1000538443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500269121 + 500269122.

It is an arithmetic number, because the mean of its divisors is an integer number (500269122).

Almost surely, 2^1000538243 is an apocalyptic number.

1000538243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000538243 is an equidigital number, since it uses as much as digits as its factorization.

1000538243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1000538243 is about 31631.2858259034. The cubic root of 1000538243 is about 1000.1793821535.

Adding to 1000538243 its reverse (3428350001), we get a palindrome (4428888244).

The spelling of 1000538243 in words is "one billion, five hundred thirty-eight thousand, two hundred forty-three".