123413772617 has 2 divisors, whose sum is σ = 123413772618. Its totient is φ = 123413772616.

The previous prime is 123413772583. The next prime is 123413772649. The reversal of 123413772617 is 716277314321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93506912521 + 29906860096 = 305789^2 + 172936^2 .

It is a cyclic number.

It is not a de Polignac number, because 123413772617 - 2⁶ = 123413772553 is a prime.

It is not a weakly prime, because it can be changed into another prime (123413772817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61706886308 + 61706886309.

It is an arithmetic number, because the mean of its divisors is an integer number (61706886309).

Almost surely, 2^123413772617 is an apocalyptic number.

It is an amenable number.

123413772617 is a deficient number, since it is larger than the sum of its proper divisors (1).

123413772617 is an equidigital number, since it uses as much as digits as its factorization.

123413772617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 44.

The spelling of 123413772617 in words is "one hundred twenty-three billion, four hundred thirteen million, seven hundred seventy-two thousand, six hundred seventeen".