123965143 has 2 divisors, whose sum is σ = 123965144. Its totient is φ = 123965142.

The previous prime is 123965131. The next prime is 123965161. The reversal of 123965143 is 341569321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123965143 - 2¹³ = 123956951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123965099 and 123965108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123965123) 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 as a sum of consecutive naturals, namely, 61982571 + 61982572.

It is an arithmetic number, because the mean of its divisors is an integer number (61982572).

Almost surely, 2^123965143 is an apocalyptic number.

123965143 is a deficient number, since it is larger than the sum of its proper divisors (1).

123965143 is an equidigital number, since it uses as much as digits as its factorization.

123965143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 123965143 is about 11133.9634901503. The cubic root of 123965143 is about 498.6163653086.

The spelling of 123965143 in words is "one hundred twenty-three million, nine hundred sixty-five thousand, one hundred forty-three".