13313138 has 4 divisors (see below), whose sum is σ = 19969710. Its totient is φ = 6656568.

The previous prime is 13313107. The next prime is 13313141. The reversal of 13313138 is 83131331.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 6723649 + 6589489 = 2593^2 + 2567^2 .

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 as a sum of consecutive naturals, namely, 3328283 + ... + 3328286.

Almost surely, 2^13313138 is an apocalyptic number.

13313138 is a deficient number, since it is larger than the sum of its proper divisors (6656572).

13313138 is an equidigital number, since it uses as much as digits as its factorization.

13313138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6656571.

The product of its digits is 648, while the sum is 23.

The square root of 13313138 is about 3648.7173088635. The cubic root of 13313138 is about 237.0064387267.

Adding to 13313138 its reverse (83131331), we get a palindrome (96444469).

The spelling of 13313138 in words is "thirteen million, three hundred thirteen thousand, one hundred thirty-eight".