123277427617 has 2 divisors, whose sum is σ = 123277427618. Its totient is φ = 123277427616.

The previous prime is 123277427573. The next prime is 123277427621. The reversal of 123277427617 is 716724772321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75708072801 + 47569354816 = 275151^2 + 218104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123277427617 is a prime.

It is not a weakly prime, because it can be changed into another prime (123277427677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61638713808 + 61638713809.

It is an arithmetic number, because the mean of its divisors is an integer number (61638713809).

Almost surely, 2^123277427617 is an apocalyptic number.

It is an amenable number.

123277427617 is a deficient number, since it is larger than the sum of its proper divisors (1).

123277427617 is an equidigital number, since it uses as much as digits as its factorization.

123277427617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382976, while the sum is 49.

The spelling of 123277427617 in words is "one hundred twenty-three billion, two hundred seventy-seven million, four hundred twenty-seven thousand, six hundred seventeen".