123528951913 has 2 divisors, whose sum is σ = 123528951914. Its totient is φ = 123528951912.

The previous prime is 123528951859. The next prime is 123528951989. The reversal of 123528951913 is 319159825321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77343503449 + 46185448464 = 278107^2 + 214908^2 .

It is an emirp because it is prime and its reverse (319159825321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123528951913 - 2¹⁷ = 123528820841 is a prime.

It is not a weakly prime, because it can be changed into another prime (123528951713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61764475956 + 61764475957.

It is an arithmetic number, because the mean of its divisors is an integer number (61764475957).

Almost surely, 2^123528951913 is an apocalyptic number.

It is an amenable number.

123528951913 is a deficient number, since it is larger than the sum of its proper divisors (1).

123528951913 is an equidigital number, since it uses as much as digits as its factorization.

123528951913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 49.

The spelling of 123528951913 in words is "one hundred twenty-three billion, five hundred twenty-eight million, nine hundred fifty-one thousand, nine hundred thirteen".