123505827971 has 2 divisors, whose sum is σ = 123505827972. Its totient is φ = 123505827970.

The previous prime is 123505827881. The next prime is 123505828009. The reversal of 123505827971 is 179728505321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123505827971 - 2³⁴ = 106325958787 is a prime.

It is not a weakly prime, because it can be changed into another prime (123505827371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61752913985 + 61752913986.

It is an arithmetic number, because the mean of its divisors is an integer number (61752913986).

Almost surely, 2^123505827971 is an apocalyptic number.

123505827971 is a deficient number, since it is larger than the sum of its proper divisors (1).

123505827971 is an equidigital number, since it uses as much as digits as its factorization.

123505827971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 50.

The spelling of 123505827971 in words is "one hundred twenty-three billion, five hundred five million, eight hundred twenty-seven thousand, nine hundred seventy-one".