13581969 has 8 divisors (see below), whose sum is σ = 18134592. Its totient is φ = 9042000.

The previous prime is 13581959. The next prime is 13581973. The reversal of 13581969 is 96918531.

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

It is not a de Polignac number, because 13581969 - 2⁹ = 13581457 is a prime.

It is a super-2 number, since 2×13581969² = 368939763833922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13581969.

It is not an unprimeable number, because it can be changed into a prime (13581959) 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, 282 + ... + 5219.

It is an arithmetic number, because the mean of its divisors is an integer number (2266824).

Almost surely, 2^13581969 is an apocalyptic number.

It is an amenable number.

13581969 is a deficient number, since it is larger than the sum of its proper divisors (4552623).

13581969 is an equidigital number, since it uses as much as digits as its factorization.

13581969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6327.

The product of its digits is 58320, while the sum is 42.

The square root of 13581969 is about 3685.3723014100. The cubic root of 13581969 is about 238.5911030287.

The spelling of 13581969 in words is "thirteen million, five hundred eighty-one thousand, nine hundred sixty-nine".