123256867 has 2 divisors, whose sum is σ = 123256868. Its totient is φ = 123256866.

The previous prime is 123256849. The next prime is 123256871. The reversal of 123256867 is 768652321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123256867 - 2¹⁹ = 122732579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123256807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61628433 + 61628434.

It is an arithmetic number, because the mean of its divisors is an integer number (61628434).

Almost surely, 2^123256867 is an apocalyptic number.

123256867 is a deficient number, since it is larger than the sum of its proper divisors (1).

123256867 is an equidigital number, since it uses as much as digits as its factorization.

123256867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 123256867 is about 11102.1109254051. The cubic root of 123256867 is about 497.6649345817.

The spelling of 123256867 in words is "one hundred twenty-three million, two hundred fifty-six thousand, eight hundred sixty-seven".