123145727 has 2 divisors, whose sum is σ = 123145728. Its totient is φ = 123145726.

The previous prime is 123145699. The next prime is 123145747. The reversal of 123145727 is 727541321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123145727 - 2²⁴ = 106368511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123145693 and 123145702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123145747) 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, 61572863 + 61572864.

It is an arithmetic number, because the mean of its divisors is an integer number (61572864).

Almost surely, 2^123145727 is an apocalyptic number.

123145727 is a deficient number, since it is larger than the sum of its proper divisors (1).

123145727 is an equidigital number, since it uses as much as digits as its factorization.

123145727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 32.

The square root of 123145727 is about 11097.1044421507. The cubic root of 123145727 is about 497.5153090750.

The spelling of 123145727 in words is "one hundred twenty-three million, one hundred forty-five thousand, seven hundred twenty-seven".