13957543 has 4 divisors (see below), whose sum is σ = 14254560. Its totient is φ = 13660528.

The previous prime is 13957523. The next prime is 13957553. The reversal of 13957543 is 34575931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34575931 = 13 ⋅2659687.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13957543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13957513) 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, 148438 + ... + 148531.

It is an arithmetic number, because the mean of its divisors is an integer number (3563640).

Almost surely, 2^13957543 is an apocalyptic number.

13957543 is a deficient number, since it is larger than the sum of its proper divisors (297017).

13957543 is an equidigital number, since it uses as much as digits as its factorization.

13957543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297016.

The product of its digits is 56700, while the sum is 37.

The square root of 13957543 is about 3735.9795234985. The cubic root of 13957543 is about 240.7703430233.

The spelling of 13957543 in words is "thirteen million, nine hundred fifty-seven thousand, five hundred forty-three".