13556949 has 32 divisors (see below), whose sum is σ = 21669120. Its totient is φ = 7375872.

The previous prime is 13556947. The next prime is 13556957. The reversal of 13556949 is 94965531.

It is not a de Polignac number, because 13556949 - 2¹ = 13556947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13556949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13556947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68719 + ... + 68915.

It is an arithmetic number, because the mean of its divisors is an integer number (677160).

Almost surely, 2^13556949 is an apocalyptic number.

It is an amenable number.

13556949 is a deficient number, since it is larger than the sum of its proper divisors (8112171).

13556949 is a wasteful number, since it uses less digits than its factorization.

13556949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its digits is 145800, while the sum is 42.

The square root of 13556949 is about 3681.9762356648. The cubic root of 13556949 is about 238.4445062490. Note that the first 3 decimals are identical.

The spelling of 13556949 in words is "thirteen million, five hundred fifty-six thousand, nine hundred forty-nine".