123155803 has 8 divisors (see below), whose sum is σ = 130613472. Its totient is φ = 115721856.

The previous prime is 123155789. The next prime is 123155821. The reversal of 123155803 is 308551321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123155803 - 2⁵ = 123155771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123155843) 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 in 7 ways as a sum of consecutive naturals, for example, 5401 + ... + 16597.

It is an arithmetic number, because the mean of its divisors is an integer number (16326684).

Almost surely, 2^123155803 is an apocalyptic number.

123155803 is a deficient number, since it is larger than the sum of its proper divisors (7457669).

123155803 is a wasteful number, since it uses less digits than its factorization.

123155803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11861.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 123155803 is about 11097.5584251672. The cubic root of 123155803 is about 497.5288778975.

The spelling of 123155803 in words is "one hundred twenty-three million, one hundred fifty-five thousand, eight hundred three".