123347531789 has 2 divisors, whose sum is σ = 123347531790. Its totient is φ = 123347531788.

The previous prime is 123347531777. The next prime is 123347531819. The reversal of 123347531789 is 987135743321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68243725225 + 55103806564 = 261235^2 + 234742^2 .

It is a cyclic number.

It is not a de Polignac number, because 123347531789 - 2⁴ = 123347531773 is a prime.

It is a super-2 number, since 2×123347531789² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123347531789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123367531789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61673765894 + 61673765895.

It is an arithmetic number, because the mean of its divisors is an integer number (61673765895).

Almost surely, 2^123347531789 is an apocalyptic number.

It is an amenable number.

123347531789 is a deficient number, since it is larger than the sum of its proper divisors (1).

123347531789 is an equidigital number, since it uses as much as digits as its factorization.

123347531789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 53.

The spelling of 123347531789 in words is "one hundred twenty-three billion, three hundred forty-seven million, five hundred thirty-one thousand, seven hundred eighty-nine".