13533749 has 8 divisors (see below), whose sum is σ = 14379960. Its totient is φ = 12712896.

The previous prime is 13533743. The next prime is 13533781. The reversal of 13533749 is 94733531.

It can be written as a sum of positive squares in 4 ways, for example, as 4231249 + 9302500 = 2057^2 + 3050^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13533749 - 2⁸ = 13533493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13533743) 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 7 ways as a sum of consecutive naturals, for example, 5234 + ... + 7379.

It is an arithmetic number, because the mean of its divisors is an integer number (1797495).

Almost surely, 2^13533749 is an apocalyptic number.

It is an amenable number.

13533749 is a deficient number, since it is larger than the sum of its proper divisors (846211).

13533749 is a wasteful number, since it uses less digits than its factorization.

13533749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12679.

The product of its digits is 34020, while the sum is 35.

The square root of 13533749 is about 3678.8244046162. The cubic root of 13533749 is about 238.3084119322.

The spelling of 13533749 in words is "thirteen million, five hundred thirty-three thousand, seven hundred forty-nine".