13409566 has 16 divisors (see below), whose sum is σ = 21425040. Its totient is φ = 6272640.

The previous prime is 13409551. The next prime is 13409587. The reversal of 13409566 is 66590431.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5065 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (1339065).

Almost surely, 2^13409566 is an apocalyptic number.

13409566 is a deficient number, since it is larger than the sum of its proper divisors (8015474).

13409566 is a wasteful number, since it uses less digits than its factorization.

13409566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 13409566 is about 3661.9074264651. The cubic root of 13409566 is about 237.5772808525.

Adding to 13409566 its reverse (66590431), we get a palindrome (79999997).

The spelling of 13409566 in words is "thirteen million, four hundred nine thousand, five hundred sixty-six".