12811623 has 8 divisors (see below), whose sum is σ = 18635136. Its totient is φ = 7764600.

The previous prime is 12811607. The next prime is 12811661. The reversal of 12811623 is 32611821.

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

It is not a de Polignac number, because 12811623 - 2⁴ = 12811607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12811593 and 12811602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12811223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194083 + ... + 194148.

It is an arithmetic number, because the mean of its divisors is an integer number (2329392).

Almost surely, 2^12811623 is an apocalyptic number.

12811623 is a deficient number, since it is larger than the sum of its proper divisors (5823513).

12811623 is a wasteful number, since it uses less digits than its factorization.

12811623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388245.

The product of its digits is 576, while the sum is 24.

The square root of 12811623 is about 3579.3327590488. The cubic root of 12811623 is about 233.9922015079.

The spelling of 12811623 in words is "twelve million, eight hundred eleven thousand, six hundred twenty-three".