16704649 has 8 divisors (see below), whose sum is σ = 18476360. Its totient is φ = 15002496.

The previous prime is 16704637. The next prime is 16704673. The reversal of 16704649 is 94640761.

It can be written as a sum of positive squares in 4 ways, for example, as 156025 + 16548624 = 395^2 + 4068^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16704649 - 2⁵ = 16704617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16704619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16884 + ... + 17845.

It is an arithmetic number, because the mean of its divisors is an integer number (2309545).

Almost surely, 2^16704649 is an apocalyptic number.

It is an amenable number.

16704649 is a deficient number, since it is larger than the sum of its proper divisors (1771711).

16704649 is a wasteful number, since it uses less digits than its factorization.

16704649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34779.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 16704649 is about 4087.1321241183. The cubic root of 16704649 is about 255.6303717166.

The spelling of 16704649 in words is "sixteen million, seven hundred four thousand, six hundred forty-nine".