124388651917 has 2 divisors, whose sum is σ = 124388651918. Its totient is φ = 124388651916.

The previous prime is 124388651897. The next prime is 124388651923. The reversal of 124388651917 is 719156883421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111578713156 + 12809938761 = 334034^2 + 113181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124388651917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124388651617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62194325958 + 62194325959.

It is an arithmetic number, because the mean of its divisors is an integer number (62194325959).

Almost surely, 2^124388651917 is an apocalyptic number.

It is an amenable number.

124388651917 is a deficient number, since it is larger than the sum of its proper divisors (1).

124388651917 is an equidigital number, since it uses as much as digits as its factorization.

124388651917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 55.

The spelling of 124388651917 in words is "one hundred twenty-four billion, three hundred eighty-eight million, six hundred fifty-one thousand, nine hundred seventeen".