16539117 has 16 divisors (see below), whose sum is σ = 25718400. Its totient is φ = 9450336.

The previous prime is 16539091. The next prime is 16539119. The reversal of 16539117 is 71193561.

It is a happy number.

It is not a de Polignac number, because 16539117 - 2⁸ = 16538861 is a prime.

It is a super-2 number, since 2×16539117² = 547084782279378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16539119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7008 + ... + 9065.

It is an arithmetic number, because the mean of its divisors is an integer number (1607400).

Almost surely, 2^16539117 is an apocalyptic number.

It is an amenable number.

16539117 is a deficient number, since it is larger than the sum of its proper divisors (9179283).

16539117 is an equidigital number, since it uses as much as digits as its factorization.

16539117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16097 (or 16083 counting only the distinct ones).

The product of its digits is 5670, while the sum is 33.

The square root of 16539117 is about 4066.8313218033. The cubic root of 16539117 is about 254.7831913398.

The spelling of 16539117 in words is "sixteen million, five hundred thirty-nine thousand, one hundred seventeen".