13539664 has 10 divisors (see below), whose sum is σ = 26233130. Its totient is φ = 6769824.

The previous prime is 13539661. The next prime is 13539671. The reversal of 13539664 is 46693531.

It can be written as a sum of positive squares in only one way, i.e., 12194064 + 1345600 = 3492^2 + 1160^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13539661) 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 as a sum of consecutive naturals, namely, 423099 + ... + 423130.

It is an arithmetic number, because the mean of its divisors is an integer number (2623313).

Almost surely, 2^13539664 is an apocalyptic number.

It is an amenable number.

13539664 is a deficient number, since it is larger than the sum of its proper divisors (12693466).

13539664 is an equidigital number, since it uses as much as digits as its factorization.

13539664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846237 (or 846231 counting only the distinct ones).

The product of its digits is 58320, while the sum is 37.

The square root of 13539664 is about 3679.6282420919. The cubic root of 13539664 is about 238.3431248796.

It can be divided in two parts, 135396 and 64, that added together give a triangular number (135460 = T₅₂₀).

The spelling of 13539664 in words is "thirteen million, five hundred thirty-nine thousand, six hundred sixty-four".