13290661 has 4 divisors (see below), whose sum is σ = 13719424. Its totient is φ = 12861900.

The previous prime is 13290647. The next prime is 13290713. The reversal of 13290661 is 16609231.

13290661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16609231 = 179 ⋅92789.

It is not a de Polignac number, because 13290661 - 2⁷ = 13290533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13290061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214335 + ... + 214396.

It is an arithmetic number, because the mean of its divisors is an integer number (3429856).

Almost surely, 2^13290661 is an apocalyptic number.

It is an amenable number.

13290661 is a deficient number, since it is larger than the sum of its proper divisors (428763).

13290661 is an equidigital number, since it uses as much as digits as its factorization.

13290661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428762.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 13290661 is about 3645.6358841771. The cubic root of 13290661 is about 236.8729817220.

Adding to 13290661 its reverse (16609231), we get a palindrome (29899892).

The spelling of 13290661 in words is "thirteen million, two hundred ninety thousand, six hundred sixty-one".