123130202609 has 2 divisors, whose sum is σ = 123130202610. Its totient is φ = 123130202608.

The previous prime is 123130202567. The next prime is 123130202621. The reversal of 123130202609 is 906202031321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63820906384 + 59309296225 = 252628^2 + 243535^2 .

It is a cyclic number.

It is not a de Polignac number, because 123130202609 - 2²⁸ = 122861767153 is a prime.

It is a super-2 number, since 2×123130202609² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123130202509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61565101304 + 61565101305.

It is an arithmetic number, because the mean of its divisors is an integer number (61565101305).

Almost surely, 2^123130202609 is an apocalyptic number.

It is an amenable number.

123130202609 is a deficient number, since it is larger than the sum of its proper divisors (1).

123130202609 is an equidigital number, since it uses as much as digits as its factorization.

123130202609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 123130202609 in words is "one hundred twenty-three billion, one hundred thirty million, two hundred two thousand, six hundred nine".