13499143 has 4 divisors (see below), whose sum is σ = 15427600. Its totient is φ = 11570688.

The previous prime is 13499131. The next prime is 13499149. The reversal of 13499143 is 34199431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34199431 = 7 ⋅4885633.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13499143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13499099 and 13499108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13499149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964218 + ... + 964231.

It is an arithmetic number, because the mean of its divisors is an integer number (3856900).

Almost surely, 2^13499143 is an apocalyptic number.

13499143 is a deficient number, since it is larger than the sum of its proper divisors (1928457).

13499143 is an equidigital number, since it uses as much as digits as its factorization.

13499143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928456.

The product of its digits is 11664, while the sum is 34.

The square root of 13499143 is about 3674.1179893956. The cubic root of 13499143 is about 238.1051191601.

The spelling of 13499143 in words is "thirteen million, four hundred ninety-nine thousand, one hundred forty-three".