13556963 has 8 divisors (see below), whose sum is σ = 15644928. Its totient is φ = 11506824.

The previous prime is 13556957. The next prime is 13556993. The reversal of 13556963 is 36965531.

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

It is not a de Polignac number, because 13556963 - 2⁴ = 13556947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13556993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8681 + ... + 10122.

It is an arithmetic number, because the mean of its divisors is an integer number (1955616).

Almost surely, 2^13556963 is an apocalyptic number.

13556963 is a deficient number, since it is larger than the sum of its proper divisors (2087965).

13556963 is a wasteful number, since it uses less digits than its factorization.

13556963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18913.

The product of its digits is 72900, while the sum is 38.

The square root of 13556963 is about 3681.9781368172. The cubic root of 13556963 is about 238.4445883280. Note that the first 3 decimals are identical.

The spelling of 13556963 in words is "thirteen million, five hundred fifty-six thousand, nine hundred sixty-three".