123352340509 has 2 divisors, whose sum is σ = 123352340510. Its totient is φ = 123352340508.

The previous prime is 123352340479. The next prime is 123352340557. The reversal of 123352340509 is 905043253321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61890493284 + 61461847225 = 248778^2 + 247915^2 .

It is an emirp because it is prime and its reverse (905043253321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123352340509 - 2³³ = 114762405917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123352340599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61676170254 + 61676170255.

It is an arithmetic number, because the mean of its divisors is an integer number (61676170255).

Almost surely, 2^123352340509 is an apocalyptic number.

It is an amenable number.

123352340509 is a deficient number, since it is larger than the sum of its proper divisors (1).

123352340509 is an equidigital number, since it uses as much as digits as its factorization.

123352340509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 123352340509 in words is "one hundred twenty-three billion, three hundred fifty-two million, three hundred forty thousand, five hundred nine".