123402043 has 2 divisors, whose sum is σ = 123402044. Its totient is φ = 123402042.

The previous prime is 123402023. The next prime is 123402049. The reversal of 123402043 is 340204321.

It is a strong prime.

It is an emirp because it is prime and its reverse (340204321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123402043 - 2⁵ = 123402011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123402043.

It is not a weakly prime, because it can be changed into another prime (123402049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61701021 + 61701022.

It is an arithmetic number, because the mean of its divisors is an integer number (61701022).

Almost surely, 2^123402043 is an apocalyptic number.

123402043 is a deficient number, since it is larger than the sum of its proper divisors (1).

123402043 is an equidigital number, since it uses as much as digits as its factorization.

123402043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 123402043 is about 11108.6472173708. The cubic root of 123402043 is about 497.8602466404.

Adding to 123402043 its reverse (340204321), we get a palindrome (463606364).

The spelling of 123402043 in words is "one hundred twenty-three million, four hundred two thousand, forty-three".