13657943 has 4 divisors (see below), whose sum is σ = 14708568. Its totient is φ = 12607320.

The previous prime is 13657939. The next prime is 13657957. The reversal of 13657943 is 34975631.

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: 34975631 = 61 ⋅573371.

It is a cyclic number.

It is not a de Polignac number, because 13657943 - 2² = 13657939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13657897 and 13657906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13657993) 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, 525293 + ... + 525318.

It is an arithmetic number, because the mean of its divisors is an integer number (3677142).

Almost surely, 2^13657943 is an apocalyptic number.

13657943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13657943 is a deficient number, since it is larger than the sum of its proper divisors (1050625).

13657943 is a wasteful number, since it uses less digits than its factorization.

13657943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050624.

The product of its digits is 68040, while the sum is 38.

The square root of 13657943 is about 3695.6654339916. The cubic root of 13657943 is about 239.0351482769.

The spelling of 13657943 in words is "thirteen million, six hundred fifty-seven thousand, nine hundred forty-three".