123863855 has 16 divisors (see below), whose sum is σ = 157650624. Its totient is φ = 93223680.

The previous prime is 123863851. The next prime is 123863867. The reversal of 123863855 is 558368321.

It is not a de Polignac number, because 123863855 - 2² = 123863851 is a prime.

It is a super-2 number, since 2×123863855² = 30684509150922050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123863851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1814 + ... + 15843.

It is an arithmetic number, because the mean of its divisors is an integer number (9853164).

Almost surely, 2^123863855 is an apocalyptic number.

123863855 is a deficient number, since it is larger than the sum of its proper divisors (33786769).

123863855 is a wasteful number, since it uses less digits than its factorization.

123863855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17746.

The product of its digits is 172800, while the sum is 41.

The square root of 123863855 is about 11129.4139558200. The cubic root of 123863855 is about 498.4805270816.

The spelling of 123863855 in words is "one hundred twenty-three million, eight hundred sixty-three thousand, eight hundred fifty-five".