13641523 has 4 divisors (see below), whose sum is σ = 15590320. Its totient is φ = 11692728.

The previous prime is 13641521. The next prime is 13641527. The reversal of 13641523 is 32514631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13641523 - 2¹ = 13641521 is a prime.

It is a super-2 number, since 2×13641523² = 372182299519058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13641521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974388 + ... + 974401.

It is an arithmetic number, because the mean of its divisors is an integer number (3897580).

Almost surely, 2^13641523 is an apocalyptic number.

13641523 is a deficient number, since it is larger than the sum of its proper divisors (1948797).

13641523 is an equidigital number, since it uses as much as digits as its factorization.

13641523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948796.

The product of its digits is 2160, while the sum is 25.

The square root of 13641523 is about 3693.4432444536. The cubic root of 13641523 is about 238.9393180559.

The spelling of 13641523 in words is "thirteen million, six hundred forty-one thousand, five hundred twenty-three".