123800288779 has 2 divisors, whose sum is σ = 123800288780. Its totient is φ = 123800288778.

The previous prime is 123800288743. The next prime is 123800288797. The reversal of 123800288779 is 977882008321.

Together with next prime (123800288797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (977882008321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123800288779 - 2²³ = 123791900171 is a prime.

It is not a weakly prime, because it can be changed into another prime (123800285779) 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, 61900144389 + 61900144390.

It is an arithmetic number, because the mean of its divisors is an integer number (61900144390).

Almost surely, 2^123800288779 is an apocalyptic number.

123800288779 is a deficient number, since it is larger than the sum of its proper divisors (1).

123800288779 is an equidigital number, since it uses as much as digits as its factorization.

123800288779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 123800288779 in words is "one hundred twenty-three billion, eight hundred million, two hundred eighty-eight thousand, seven hundred seventy-nine".