123964961243 has 2 divisors, whose sum is σ = 123964961244. Its totient is φ = 123964961242.

The previous prime is 123964961233. The next prime is 123964961251. The reversal of 123964961243 is 342169469321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123964961243 - 2²⁸ = 123696525787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123964961191 and 123964961200.

It is not a weakly prime, because it can be changed into another prime (123964961233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61982480621 + 61982480622.

It is an arithmetic number, because the mean of its divisors is an integer number (61982480622).

Almost surely, 2^123964961243 is an apocalyptic number.

123964961243 is a deficient number, since it is larger than the sum of its proper divisors (1).

123964961243 is an equidigital number, since it uses as much as digits as its factorization.

123964961243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 50.

The spelling of 123964961243 in words is "one hundred twenty-three billion, nine hundred sixty-four million, nine hundred sixty-one thousand, two hundred forty-three".