123816355 has 32 divisors (see below), whose sum is σ = 171460800. Its totient is φ = 85020672.

The previous prime is 123816311. The next prime is 123816359. The reversal of 123816355 is 553618321.

It is not a de Polignac number, because 123816355 - 2¹⁵ = 123783587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123816355.

It is not an unprimeable number, because it can be changed into a prime (123816359) 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 31 ways as a sum of consecutive naturals, for example, 97716 + ... + 98974.

It is an arithmetic number, because the mean of its divisors is an integer number (5358150).

Almost surely, 2^123816355 is an apocalyptic number.

123816355 is a deficient number, since it is larger than the sum of its proper divisors (47644445).

123816355 is a wasteful number, since it uses less digits than its factorization.

123816355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383.

The product of its digits is 21600, while the sum is 34.

The square root of 123816355 is about 11127.2797664119. The cubic root of 123816355 is about 498.4167989064.

The spelling of 123816355 in words is "one hundred twenty-three million, eight hundred sixteen thousand, three hundred fifty-five".