13998739 has 4 divisors (see below), whose sum is σ = 14039200. Its totient is φ = 13958280.

The previous prime is 13998737. The next prime is 13998773. The reversal of 13998739 is 93789931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93789931 = 37 ⋅2534863.

It is a cyclic number.

It is not a de Polignac number, because 13998739 - 2¹ = 13998737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13998692 and 13998701.

It is not an unprimeable number, because it can be changed into a prime (13998737) 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 in 3 ways as a sum of consecutive naturals, for example, 19707 + ... + 20404.

It is an arithmetic number, because the mean of its divisors is an integer number (3509800).

Almost surely, 2^13998739 is an apocalyptic number.

13998739 is a deficient number, since it is larger than the sum of its proper divisors (40461).

13998739 is an equidigital number, since it uses as much as digits as its factorization.

13998739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40460.

The product of its digits is 367416, while the sum is 49.

The square root of 13998739 is about 3741.4888747663. The cubic root of 13998739 is about 241.0069900350.

The spelling of 13998739 in words is "thirteen million, nine hundred ninety-eight thousand, seven hundred thirty-nine".