13499138 has 4 divisors (see below), whose sum is σ = 20248710. Its totient is φ = 6749568.

The previous prime is 13499131. The next prime is 13499149. The reversal of 13499138 is 83199431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83199431 = 7 ⋅11885633.

It can be written as a sum of positive squares in only one way, i.e., 12229009 + 1270129 = 3497^2 + 1127^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13499131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3374783 + ... + 3374786.

Almost surely, 2^13499138 is an apocalyptic number.

13499138 is a deficient number, since it is larger than the sum of its proper divisors (6749572).

13499138 is an equidigital number, since it uses as much as digits as its factorization.

13499138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6749571.

The product of its digits is 23328, while the sum is 38.

The square root of 13499138 is about 3674.1173089601. The cubic root of 13499138 is about 238.1050897625.

The spelling of 13499138 in words is "thirteen million, four hundred ninety-nine thousand, one hundred thirty-eight".