123378863 has 2 divisors, whose sum is σ = 123378864. Its totient is φ = 123378862.

The previous prime is 123378841. The next prime is 123378889. The reversal of 123378863 is 368873321.

It is a weak prime.

It is an emirp because it is prime and its reverse (368873321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123378863 - 2¹² = 123374767 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123378863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123878863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61689431 + 61689432.

It is an arithmetic number, because the mean of its divisors is an integer number (61689432).

Almost surely, 2^123378863 is an apocalyptic number.

123378863 is a deficient number, since it is larger than the sum of its proper divisors (1).

123378863 is an equidigital number, since it uses as much as digits as its factorization.

123378863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 123378863 is about 11107.6038370118. The cubic root of 123378863 is about 497.8290717833.

The spelling of 123378863 in words is "one hundred twenty-three million, three hundred seventy-eight thousand, eight hundred sixty-three".