123256163 has 2 divisors, whose sum is σ = 123256164. Its totient is φ = 123256162.

The previous prime is 123256157. The next prime is 123256181. The reversal of 123256163 is 361652321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123256163 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (123256123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61628081 + 61628082.

It is an arithmetic number, because the mean of its divisors is an integer number (61628082).

Almost surely, 2^123256163 is an apocalyptic number.

123256163 is a deficient number, since it is larger than the sum of its proper divisors (1).

123256163 is an equidigital number, since it uses as much as digits as its factorization.

123256163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 123256163 is about 11102.0792196777. The cubic root of 123256163 is about 497.6639870840.

It can be divided in two parts, 12325 and 6163, that multiplied together give a triangular number (75958975 = T₁₂₃₂₅).

The spelling of 123256163 in words is "one hundred twenty-three million, two hundred fifty-six thousand, one hundred sixty-three".