16697684 has 6 divisors (see below), whose sum is σ = 29220954. Its totient is φ = 8348840.

The previous prime is 16697683. The next prime is 16697687. The reversal of 16697684 is 48679661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 67600 = 4078^2 + 260^2 .

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16697683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2087207 + ... + 2087214.

It is an arithmetic number, because the mean of its divisors is an integer number (4870159).

Almost surely, 2^16697684 is an apocalyptic number.

It is an amenable number.

16697684 is a deficient number, since it is larger than the sum of its proper divisors (12523270).

16697684 is a wasteful number, since it uses less digits than its factorization.

16697684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174425 (or 4174423 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 16697684 is about 4086.2799708292. The cubic root of 16697684 is about 255.5948384337.

The spelling of 16697684 in words is "sixteen million, six hundred ninety-seven thousand, six hundred eighty-four".