13748239 has 4 divisors (see below), whose sum is σ = 13981320. Its totient is φ = 13515160.

The previous prime is 13748237. The next prime is 13748249. The reversal of 13748239 is 93284731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93284731 = 103 ⋅905677.

It is a cyclic number.

It is not a de Polignac number, because 13748239 - 2¹ = 13748237 is a prime.

It is a super-2 number, since 2×13748239² = 378028151202242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13748198 and 13748207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13748237) 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, 116452 + ... + 116569.

It is an arithmetic number, because the mean of its divisors is an integer number (3495330).

Almost surely, 2^13748239 is an apocalyptic number.

13748239 is a deficient number, since it is larger than the sum of its proper divisors (233081).

13748239 is an equidigital number, since it uses as much as digits as its factorization.

13748239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233080.

The product of its digits is 36288, while the sum is 37.

The square root of 13748239 is about 3707.8617827530. The cubic root of 13748239 is about 239.5607649130.

The spelling of 13748239 in words is "thirteen million, seven hundred forty-eight thousand, two hundred thirty-nine".