13749564 has 12 divisors (see below), whose sum is σ = 32082344. Its totient is φ = 4583184.

The previous prime is 13749557. The next prime is 13749569. The reversal of 13749564 is 46594731.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13749569) 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 3 ways as a sum of consecutive naturals, for example, 572887 + ... + 572910.

Almost surely, 2^13749564 is an apocalyptic number.

It is an amenable number.

13749564 is an abundant number, since it is smaller than the sum of its proper divisors (18332780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13749564 is a wasteful number, since it uses less digits than its factorization.

13749564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145804 (or 1145802 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 13749564 is about 3708.0404528538. The cubic root of 13749564 is about 239.5684606336.

The spelling of 13749564 in words is "thirteen million, seven hundred forty-nine thousand, five hundred sixty-four".