13509538 has 8 divisors (see below), whose sum is σ = 23159232. Its totient is φ = 5789796.

The previous prime is 13509527. The next prime is 13509557. The reversal of 13509538 is 83590531.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 482470 + ... + 482497.

It is an arithmetic number, because the mean of its divisors is an integer number (2894904).

Almost surely, 2^13509538 is an apocalyptic number.

13509538 is a deficient number, since it is larger than the sum of its proper divisors (9649694).

13509538 is an equidigital number, since it uses as much as digits as its factorization.

13509538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964976.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 13509538 is about 3675.5323423961. The cubic root of 13509538 is about 238.1662210060.

The spelling of 13509538 in words is "thirteen million, five hundred nine thousand, five hundred thirty-eight".