13900543 has 4 divisors (see below), whose sum is σ = 14718240. Its totient is φ = 13082848.

The previous prime is 13900519. The next prime is 13900553. The reversal of 13900543 is 34500931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34500931 = 547 ⋅63073.

It is a cyclic number.

It is not a de Polignac number, because 13900543 - 2²¹ = 11803391 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 (13900553) 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, 408823 + ... + 408856.

It is an arithmetic number, because the mean of its divisors is an integer number (3679560).

Almost surely, 2^13900543 is an apocalyptic number.

13900543 is a deficient number, since it is larger than the sum of its proper divisors (817697).

13900543 is an equidigital number, since it uses as much as digits as its factorization.

13900543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817696.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 13900543 is about 3728.3431977220. The cubic root of 13900543 is about 240.4421421354.

The spelling of 13900543 in words is "thirteen million, nine hundred thousand, five hundred forty-three".