11697409 has 4 divisors (see below), whose sum is σ = 12206016. Its totient is φ = 11188804.

The previous prime is 11697403. The next prime is 11697431. The reversal of 11697409 is 90479611.

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: 90479611 = 43 ⋅2104177.

It is a cyclic number.

It is not a de Polignac number, because 11697409 - 2⁹ = 11696897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11697403) 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, 254269 + ... + 254314.

It is an arithmetic number, because the mean of its divisors is an integer number (3051504).

Almost surely, 2^11697409 is an apocalyptic number.

It is an amenable number.

11697409 is a deficient number, since it is larger than the sum of its proper divisors (508607).

11697409 is an equidigital number, since it uses as much as digits as its factorization.

11697409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508606.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 11697409 is about 3420.1475114387. The cubic root of 11697409 is about 227.0021088253.

The spelling of 11697409 in words is "eleven million, six hundred ninety-seven thousand, four hundred nine".