13308557 has 4 divisors (see below), whose sum is σ = 13490940. Its totient is φ = 13126176.

The previous prime is 13308541. The next prime is 13308583. The reversal of 13308557 is 75580331.

13308557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10118761 + 3189796 = 3181^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 13308557 - 2⁴ = 13308541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13308587) 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 3 ways as a sum of consecutive naturals, for example, 91082 + ... + 91227.

It is an arithmetic number, because the mean of its divisors is an integer number (3372735).

Almost surely, 2^13308557 is an apocalyptic number.

It is an amenable number.

13308557 is a deficient number, since it is larger than the sum of its proper divisors (182383).

13308557 is an equidigital number, since it uses as much as digits as its factorization.

13308557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182382.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 13308557 is about 3648.0894999986. The cubic root of 13308557 is about 236.9792512710.

Adding to 13308557 its reverse (75580331), we get a palindrome (88888888).

The spelling of 13308557 in words is "thirteen million, three hundred eight thousand, five hundred fifty-seven".