13491523 has 8 divisors (see below), whose sum is σ = 14420592. Its totient is φ = 12577536.

The previous prime is 13491509. The next prime is 13491529. The reversal of 13491523 is 32519431.

13491523 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13491523 - 2⁹ = 13491011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13491491 and 13491500.

It is not an unprimeable number, because it can be changed into a prime (13491529) 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, 1890 + ... + 5527.

It is an arithmetic number, because the mean of its divisors is an integer number (1802574).

Almost surely, 2^13491523 is an apocalyptic number.

13491523 is a deficient number, since it is larger than the sum of its proper divisors (929069).

13491523 is a wasteful number, since it uses less digits than its factorization.

13491523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7541.

The product of its digits is 3240, while the sum is 28.

The square root of 13491523 is about 3673.0808594421. The cubic root of 13491523 is about 238.0603088462.

It can be divided in two parts, 13 and 491523, that added together give a triangular number (491536 = T₉₉₁).

The spelling of 13491523 in words is "thirteen million, four hundred ninety-one thousand, five hundred twenty-three".