13538943 has 24 divisors (see below), whose sum is σ = 21490560. Its totient is φ = 8145360.

The previous prime is 13538933. The next prime is 13538957. The reversal of 13538943 is 34983531.

It is not a de Polignac number, because 13538943 - 2⁶ = 13538879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13538898 and 13538907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13538923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15718 + ... + 16556.

It is an arithmetic number, because the mean of its divisors is an integer number (895440).

Almost surely, 2^13538943 is an apocalyptic number.

13538943 is a deficient number, since it is larger than the sum of its proper divisors (7951617).

13538943 is a wasteful number, since it uses less digits than its factorization.

13538943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019 (or 1016 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 13538943 is about 3679.5302689338. The cubic root of 13538943 is about 238.3388941384.

It can be divided in two parts, 1353 and 8943, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 13538943 in words is "thirteen million, five hundred thirty-eight thousand, nine hundred forty-three".