16549697 has 2 divisors, whose sum is σ = 16549698. Its totient is φ = 16549696.

The previous prime is 16549681. The next prime is 16549747. The reversal of 16549697 is 79694561.

16549697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16008001 + 541696 = 4001^2 + 736^2 .

It is an emirp because it is prime and its reverse (79694561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16549697 - 2⁴ = 16549681 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (16549297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8274848 + 8274849.

It is an arithmetic number, because the mean of its divisors is an integer number (8274849).

Almost surely, 2^16549697 is an apocalyptic number.

It is an amenable number.

16549697 is a deficient number, since it is larger than the sum of its proper divisors (1).

16549697 is an equidigital number, since it uses as much as digits as its factorization.

16549697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 47.

The square root of 16549697 is about 4068.1318808515. The cubic root of 16549697 is about 254.8375076530.

The spelling of 16549697 in words is "sixteen million, five hundred forty-nine thousand, six hundred ninety-seven".