1230040043 has 2 divisors, whose sum is σ = 1230040044. Its totient is φ = 1230040042.

The previous prime is 1230039991. The next prime is 1230040061. The reversal of 1230040043 is 3400400321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1230040043 - 2⁸ = 1230039787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1230040093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615020021 + 615020022.

It is an arithmetic number, because the mean of its divisors is an integer number (615020022).

Almost surely, 2^1230040043 is an apocalyptic number.

1230040043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230040043 is an equidigital number, since it uses as much as digits as its factorization.

1230040043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1230040043 is about 35071.9267078386. The cubic root of 1230040043 is about 1071.4528965897.

Adding to 1230040043 its reverse (3400400321), we get a palindrome (4630440364).

The spelling of 1230040043 in words is "one billion, two hundred thirty million, forty thousand, forty-three".