13953409 has 4 divisors (see below), whose sum is σ = 13970880. Its totient is φ = 13935940.

The previous prime is 13953383. The next prime is 13953427. The reversal of 13953409 is 90435931.

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: 90435931 = 23 ⋅3931997.

It is a cyclic number.

It is not a de Polignac number, because 13953409 - 2⁷ = 13953281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13953449) 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, 7477 + ... + 9154.

It is an arithmetic number, because the mean of its divisors is an integer number (3492720).

Almost surely, 2^13953409 is an apocalyptic number.

It is an amenable number.

13953409 is a deficient number, since it is larger than the sum of its proper divisors (17471).

13953409 is an equidigital number, since it uses as much as digits as its factorization.

13953409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17470.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 13953409 is about 3735.4262139681. The cubic root of 13953409 is about 240.7465699069.

The spelling of 13953409 in words is "thirteen million, nine hundred fifty-three thousand, four hundred nine".