43123243 has 2 divisors, whose sum is σ = 43123244. Its totient is φ = 43123242.

The previous prime is 43123211. The next prime is 43123309. The reversal of 43123243 is 34232134.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43123243 - 2⁵ = 43123211 is a prime.

It is a super-2 number, since 2×43123243² = 3719228173674098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43123043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21561621 + 21561622.

It is an arithmetic number, because the mean of its divisors is an integer number (21561622).

Almost surely, 2^43123243 is an apocalyptic number.

43123243 is a deficient number, since it is larger than the sum of its proper divisors (1).

43123243 is an equidigital number, since it uses as much as digits as its factorization.

43123243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 22.

The square root of 43123243 is about 6566.8289912255. The cubic root of 43123243 is about 350.6741916529.

Adding to 43123243 its reverse (34232134), we get a palindrome (77355377).

The spelling of 43123243 in words is "forty-three million, one hundred twenty-three thousand, two hundred forty-three".