13697409 has 8 divisors (see below), whose sum is σ = 19923552. Its totient is φ = 8301440.

The previous prime is 13697399. The next prime is 13697429. The reversal of 13697409 is 90479631.

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 13697409 - 2⁵ = 13697377 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13697429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207504 + ... + 207569.

It is an arithmetic number, because the mean of its divisors is an integer number (2490444).

Almost surely, 2^13697409 is an apocalyptic number.

It is an amenable number.

13697409 is a deficient number, since it is larger than the sum of its proper divisors (6226143).

13697409 is a wasteful number, since it uses less digits than its factorization.

13697409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415087.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 13697409 is about 3701.0010807888. The cubic root of 13697409 is about 239.2651655672.

It can be divided in two parts, 1369 and 7409, that added together give a palindrome (8778).

The spelling of 13697409 in words is "thirteen million, six hundred ninety-seven thousand, four hundred nine".