13662289 has 8 divisors (see below), whose sum is σ = 14404608. Its totient is φ = 12938880.

The previous prime is 13662283. The next prime is 13662293. The reversal of 13662289 is 98226631.

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 13662289 - 2³ = 13662281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13662281) 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, 3232 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (1800576).

Almost surely, 2^13662289 is an apocalyptic number.

It is an amenable number.

13662289 is a deficient number, since it is larger than the sum of its proper divisors (742319).

13662289 is an equidigital number, since it uses as much as digits as its factorization.

13662289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9455.

The product of its digits is 31104, while the sum is 37.

The square root of 13662289 is about 3696.2533733498. The cubic root of 13662289 is about 239.0604994977.

It can be divided in two parts, 1366 and 2289, that added together give a triangular number (3655 = T₈₅).

The spelling of 13662289 in words is "thirteen million, six hundred sixty-two thousand, two hundred eighty-nine".