810123303 has 16 divisors (see below), whose sum is σ = 1178860032. Its totient is φ = 490776000.

The previous prime is 810123299. The next prime is 810123337. The reversal of 810123303 is 303321018.

It is a happy number.

It is not a de Polignac number, because 810123303 - 2² = 810123299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 810123303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810123803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116443 + ... + 123203.

It is an arithmetic number, because the mean of its divisors is an integer number (73678752).

Almost surely, 2^810123303 is an apocalyptic number.

810123303 is a deficient number, since it is larger than the sum of its proper divisors (368736729).

810123303 is a wasteful number, since it uses less digits than its factorization.

810123303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10406.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 810123303 is about 28462.6650719851. The cubic root of 810123303 is about 932.2170495208.

The spelling of 810123303 in words is "eight hundred ten million, one hundred twenty-three thousand, three hundred three".