43490123 has 2 divisors, whose sum is σ = 43490124. Its totient is φ = 43490122.

The previous prime is 43490093. The next prime is 43490141. The reversal of 43490123 is 32109434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43490123 - 2¹⁰ = 43489099 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 43490092 and 43490101.

It is not a weakly prime, because it can be changed into another prime (43490143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21745061 + 21745062.

It is an arithmetic number, because the mean of its divisors is an integer number (21745062).

Almost surely, 2^43490123 is an apocalyptic number.

43490123 is a deficient number, since it is larger than the sum of its proper divisors (1).

43490123 is an equidigital number, since it uses as much as digits as its factorization.

43490123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 43490123 is about 6594.7041631903. The cubic root of 43490123 is about 351.6658626497.

Adding to 43490123 its reverse (32109434), we get a palindrome (75599557).

The spelling of 43490123 in words is "forty-three million, four hundred ninety thousand, one hundred twenty-three".