1040000243 has 2 divisors, whose sum is σ = 1040000244. Its totient is φ = 1040000242.

The previous prime is 1040000239. The next prime is 1040000263. The reversal of 1040000243 is 3420000401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1040000243 - 2² = 1040000239 is a prime.

It is not a weakly prime, because it can be changed into another prime (1040000263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520000121 + 520000122.

It is an arithmetic number, because the mean of its divisors is an integer number (520000122).

Almost surely, 2^1040000243 is an apocalyptic number.

1040000243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040000243 is an equidigital number, since it uses as much as digits as its factorization.

1040000243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 1040000243 is about 32249.0347607490. The cubic root of 1040000243 is about 1013.1594827297.

Adding to 1040000243 its reverse (3420000401), we get a palindrome (4460000644).

The spelling of 1040000243 in words is "one billion, forty million, two hundred forty-three", and thus it is an aban number.