123432143 has 2 divisors, whose sum is σ = 123432144. Its totient is φ = 123432142.

The previous prime is 123432131. The next prime is 123432167. The reversal of 123432143 is 341234321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123432143 - 2¹⁴ = 123415759 is a prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123432103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61716071 + 61716072.

It is an arithmetic number, because the mean of its divisors is an integer number (61716072).

Almost surely, 2^123432143 is an apocalyptic number.

123432143 is a deficient number, since it is larger than the sum of its proper divisors (1).

123432143 is an equidigital number, since it uses as much as digits as its factorization.

123432143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 123432143 is about 11110.0019351934. The cubic root of 123432143 is about 497.9007224024.

Adding to 123432143 its reverse (341234321), we get a palindrome (464666464).

The spelling of 123432143 in words is "one hundred twenty-three million, four hundred thirty-two thousand, one hundred forty-three".