13406569 has 4 divisors (see below), whose sum is σ = 14625360. Its totient is φ = 12187780.

The previous prime is 13406531. The next prime is 13406579. The reversal of 13406569 is 96560431.

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.

It is a de Polignac number, because none of the positive numbers 2^k-13406569 is a prime.

It is a super-2 number, since 2×13406569² = 359472184703522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13406579) 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, 609379 + ... + 609400.

It is an arithmetic number, because the mean of its divisors is an integer number (3656340).

Almost surely, 2^13406569 is an apocalyptic number.

It is an amenable number.

13406569 is a deficient number, since it is larger than the sum of its proper divisors (1218791).

13406569 is a wasteful number, since it uses less digits than its factorization.

13406569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218790.

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

The square root of 13406569 is about 3661.4981906318. The cubic root of 13406569 is about 237.5595802507.

The spelling of 13406569 in words is "thirteen million, four hundred six thousand, five hundred sixty-nine".