13553949 has 8 divisors (see below), whose sum is σ = 18089440. Its totient is φ = 9027216.

The previous prime is 13553909. The next prime is 13553957. The reversal of 13553949 is 94935531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13553949 - 2²⁰ = 12505373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13553909) by changing a digit.

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, 3654 + ... + 6360.

It is an arithmetic number, because the mean of its divisors is an integer number (2261180).

Almost surely, 2^13553949 is an apocalyptic number.

It is an amenable number.

13553949 is a deficient number, since it is larger than the sum of its proper divisors (4535491).

13553949 is a wasteful number, since it uses less digits than its factorization.

13553949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379.

The product of its digits is 72900, while the sum is 39.

The square root of 13553949 is about 3681.5688232057. The cubic root of 13553949 is about 238.4269165910.

The spelling of 13553949 in words is "thirteen million, five hundred fifty-three thousand, nine hundred forty-nine".