123142309643 has 2 divisors, whose sum is σ = 123142309644. Its totient is φ = 123142309642.

The previous prime is 123142309637. The next prime is 123142309679. The reversal of 123142309643 is 346903241321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123142309643 - 2²⁶ = 123075200779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123142309597 and 123142309606.

It is not a weakly prime, because it can be changed into another prime (123142309243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61571154821 + 61571154822.

It is an arithmetic number, because the mean of its divisors is an integer number (61571154822).

Almost surely, 2^123142309643 is an apocalyptic number.

123142309643 is a deficient number, since it is larger than the sum of its proper divisors (1).

123142309643 is an equidigital number, since it uses as much as digits as its factorization.

123142309643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 123142309643 in words is "one hundred twenty-three billion, one hundred forty-two million, three hundred nine thousand, six hundred forty-three".