16539797 has 2 divisors, whose sum is σ = 16539798. Its totient is φ = 16539796.

The previous prime is 16539791. The next prime is 16539799. The reversal of 16539797 is 79793561.

It is a happy number.

16539797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 5424241 = 3334^2 + 2329^2 .

It is an emirp because it is prime and its reverse (79793561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16539797 - 2⁴ = 16539781 is a prime.

Together with 16539799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16539791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8269898 + 8269899.

It is an arithmetic number, because the mean of its divisors is an integer number (8269899).

Almost surely, 2^16539797 is an apocalyptic number.

It is an amenable number.

16539797 is a deficient number, since it is larger than the sum of its proper divisors (1).

16539797 is an equidigital number, since it uses as much as digits as its factorization.

16539797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357210, while the sum is 47.

The square root of 16539797 is about 4066.9149241163. The cubic root of 16539797 is about 254.7866830658.

The spelling of 16539797 in words is "sixteen million, five hundred thirty-nine thousand, seven hundred ninety-seven".