13191423 has 16 divisors (see below), whose sum is σ = 20222976. Its totient is φ = 7492320.

The previous prime is 13191421. The next prime is 13191449. The reversal of 13191423 is 32419131.

It is a Cunningham number, because it is equal to 3632²-1.

It is not a de Polignac number, because 13191423 - 2¹ = 13191421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13191393 and 13191402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13191421) 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, 1818 + ... + 5448.

It is an arithmetic number, because the mean of its divisors is an integer number (1263936).

Almost surely, 2^13191423 is an apocalyptic number.

13191423 is a deficient number, since it is larger than the sum of its proper divisors (7031553).

13191423 is a wasteful number, since it uses less digits than its factorization.

13191423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814.

The product of its digits is 648, while the sum is 24.

The square root of 13191423 is about 3631.9998623348. Note that the first 3 decimals coincide. The cubic root of 13191423 is about 236.2819513909.

The spelling of 13191423 in words is "thirteen million, one hundred ninety-one thousand, four hundred twenty-three".