123402443 has 4 divisors (see below), whose sum is σ = 123439488. Its totient is φ = 123365400.

The previous prime is 123402431. The next prime is 123402467. The reversal of 123402443 is 344204321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344204321 = 17 ⋅20247313.

It is a cyclic number.

It is not a de Polignac number, because 123402443 - 2⁶ = 123402379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123402403) 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 in 3 ways as a sum of consecutive naturals, for example, 12971 + ... + 20372.

It is an arithmetic number, because the mean of its divisors is an integer number (30859872).

Almost surely, 2^123402443 is an apocalyptic number.

123402443 is a deficient number, since it is larger than the sum of its proper divisors (37045).

123402443 is an equidigital number, since it uses as much as digits as its factorization.

123402443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37044.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 123402443 is about 11108.6652213486. The cubic root of 123402443 is about 497.8607845674.

Adding to 123402443 its reverse (344204321), we get a palindrome (467606764).

The spelling of 123402443 in words is "one hundred twenty-three million, four hundred two thousand, four hundred forty-three".