16539743 has 4 divisors (see below), whose sum is σ = 18043368. Its totient is φ = 15036120.

The previous prime is 16539727. The next prime is 16539751. The reversal of 16539743 is 34793561.

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: 34793561 = 11 ⋅3163051.

It is not a de Polignac number, because 16539743 - 2⁴ = 16539727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16539697 and 16539706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16539713) 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, 751796 + ... + 751817.

It is an arithmetic number, because the mean of its divisors is an integer number (4510842).

Almost surely, 2^16539743 is an apocalyptic number.

16539743 is a deficient number, since it is larger than the sum of its proper divisors (1503625).

16539743 is a wasteful number, since it uses less digits than its factorization.

16539743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503624.

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

The square root of 16539743 is about 4066.9082851719. The cubic root of 16539743 is about 254.7864057852.

The spelling of 16539743 in words is "sixteen million, five hundred thirty-nine thousand, seven hundred forty-three".