123444535013 has 2 divisors, whose sum is σ = 123444535014. Its totient is φ = 123444535012.

The previous prime is 123444535009. The next prime is 123444535121. The reversal of 123444535013 is 310535444321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118744335649 + 4700199364 = 344593^2 + 68558^2 .

It is a cyclic number.

It is not a de Polignac number, because 123444535013 - 2² = 123444535009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123444835013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61722267506 + 61722267507.

It is an arithmetic number, because the mean of its divisors is an integer number (61722267507).

Almost surely, 2^123444535013 is an apocalyptic number.

It is an amenable number.

123444535013 is a deficient number, since it is larger than the sum of its proper divisors (1).

123444535013 is an equidigital number, since it uses as much as digits as its factorization.

123444535013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 123444535013 its reverse (310535444321), we get a palindrome (433979979334).

The spelling of 123444535013 in words is "one hundred twenty-three billion, four hundred forty-four million, five hundred thirty-five thousand, thirteen".