123343355537 has 2 divisors, whose sum is σ = 123343355538. Its totient is φ = 123343355536.

The previous prime is 123343355459. The next prime is 123343355539. The reversal of 123343355537 is 735553343321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108215339521 + 15128016016 = 328961^2 + 122996^2 .

It is a cyclic number.

It is not a de Polignac number, because 123343355537 - 2¹⁰ = 123343354513 is a prime.

Together with 123343355539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123343355539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61671677768 + 61671677769.

It is an arithmetic number, because the mean of its divisors is an integer number (61671677769).

Almost surely, 2^123343355537 is an apocalyptic number.

It is an amenable number.

123343355537 is a deficient number, since it is larger than the sum of its proper divisors (1).

123343355537 is an equidigital number, since it uses as much as digits as its factorization.

123343355537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1701000, while the sum is 44.

Adding to 123343355537 its reverse (735553343321), we get a palindrome (858896698858).

The spelling of 123343355537 in words is "one hundred twenty-three billion, three hundred forty-three million, three hundred fifty-five thousand, five hundred thirty-seven".